@article {363,
	title = {CO2 and SO2 interactions with methylated poly(ethyleneimine) functionalized Capacitive Micromachined Ultrasonic Transducers (CMUTs): gas sensing and degradation mechanism},
	journal = {ACS Applied Electronic MaterialsACS Applied Electronic Materials},
	year = {2019},
	note = {doi: 10.1021/acsaelm.9b00151},
	month = {2019/06/10},
	publisher = {American Chemical Society},
	url = {https://doi.org/10.1021/acsaelm.9b00151},
	author = {Barauskas, Dovydas and Park, Sang Jae and Pelenis, Donatas and Vanagas, Gailius and Lee, Jason J. and Virzonis, Darius and Jones, Christopher W. and Baltrusaitis, Jonas}
}
@article {347,
	title = {Critical review on the active site structure of sulfated zirconia catalysts and prospects in fuel production},
	journal = {Applied Catalysis A General},
	volume = {572},
	year = {2019},
	month = {2019/02/25/},
	pages = {210 - 225},
	abstract = {This article critically reviews the literature on sulfated zirconia catalysts for variety of important hydrocarbon and oxygenate reactions including ethylene dimerization, isomerization, alkylation and esterification. The catalyst synthesis method-resulting molecular structure relationships, stability and reactive transformations of the active site in response to gas phase environment, reaction mechanisms, reaction intermediates, the corresponding kinetics and effect of some popular promoters are covered. Key structural features of the active sites have been extensively investigated but the conclusive structure is yet to be determined due to the diversity of the preparation methods (nature and crystallinity of the support, sulfate deposition method, sulfate coverage) as well as the diversity of the experimental conditions used during the spectroscopic determination. Similarly, the effect of the promoters and the synergistic effects of the promoter/sulfate sites in the presence of hydrocarbons are not well-defined. Finally, multiple theories exist for the reactive mechanisms on sulfated zirconia but most rely on the homogeneous reaction mechanisms, such as those for ethylene dimerization and butane alkylation with butane. Collectively, these show the lack of a fundamental understanding and the need of modern catalysis studies of this important catalytic system.},
	keywords = {Alkylation, Catalyst, Dimerization, Esterification, Ethylene, Isomerization, Sulfated zirconia},
	isbn = {0926-860X},
	url = {http://www.sciencedirect.com/science/article/pii/S0926860X18306082},
	author = {Yan, George Xu and Wang, Anqi and Wachs, Israel E. and Baltrusaitis, Jonas}
}
@article {315,
	title = {Carnallite-Derived Solid Waste as Potassium (K) and Magnesium (Mg) Source in Granulated Compound NPK Fertilizers},
	journal = {ACS Sustainable Chemistry \& Engineering},
	volume = {6},
	year = {2018},
	note = {doi: 10.1021/acssuschemeng.8b01773},
	month = {2018/07/02},
	pages = {9427 - 9433},
	publisher = {American Chemical Society},
	url = {https://doi.org/10.1021/acssuschemeng.8b01773},
	author = {Sharma, Lohit and Brigaityte, Odeta and Honer, Kenneth and Kalfaoglu, Eren and Slinksiene, Rasa and Streimikis, Virginijus and Sviklas, Alfredas Martynas and Baltrusaitis, Jonas}
}
@article {224,
	title = {CH4 and H2S reforming to CH3SH and H2 catalyzed by metal-promoted Mo6S8 clusters: a first-principles micro-kinetic study},
	journal = {Catalysis Science \& Technology},
	volume = {7},
	year = {2017},
	month = {2017},
	pages = {3546 - 3554},
	publisher = {The Royal Society of Chemistry},
	abstract = {Direct processing of sour, e.g. containing large amounts of acidic H2S and/or CO2 molecules, natural gas is of direct interest as vast amounts of it are available and accessible but are underutilized. While sour natural gas is still treated using energy-intensive amine absorption/desorption, here we propose and describe a first step in catalytically producing a value added chemical and energy carrier, CH3SH and H2, respectively. For this purpose, we performed Density Functional Theory (DFT) and microkinetic modelling of CH4 and H2S reaction pathways to form CH3SH and H2 as a first step in elucidating complex yet not explored pathways in oxygen-free sour gas reforming. For this purpose, we utilized bare unpromoted and K- or Ni-promoted Mo6S8 clusters. CH4 dissociation was found to be the rate-determining step above 1100 K on Ni-promoted Mo6S8 while H2 formation was the rate-determining step on the bare and K-promoted Mo6S8. At lower reaction temperatures between 800 and 1100 K, CH3SH formation becomes an important step, especially on Ni-Mo6S8. This method presents an interesting route of direct catalytic sour natural gas processing which potentially leads to high-value hydrocarbons, such as ethylene, using CH3SH as a reactive intermediate.},
	isbn = {2044-4753},
	url = {http://dx.doi.org/10.1039/C7CY00857K},
	author = {Taifan, William and Arvidsson, Adam A. and Nelson, Eric and Hellman, Anders and Baltrusaitis, Jonas}
}
@article {47,
	title = {Chemical routes to hydrocarbons from pyrolysis of lignocellulose using Cs promoted amorphous silica alumina catalyst.},
	journal = {Catalysis Today},
	volume = {269},
	year = {2016},
	note = {CAPLUS AN 2016:9030(Journal; Online Computer File)},
	month = {2016},
	pages = {156 - 165},
	publisher = {Elsevier B.V.},
	abstract = {Lignocellulos biomass can be converted to bio-oil contg. aliph. hydrocarbons via catalytic pyrolysis at 500 {\textdegree}C in the presence of Cs modified amorphous silica alumina (Cs/ASA).  The reaction routes for the formation of aliph. hydrocarbons was studied using biomass constituent, viz. cellulose, hemicellulose, lignin, and single model components in a pyrolyzer system in conjunction with GC/MS.  The pyrolysis behavior of each biomass constituent was also studied using TGA.  The results showed that in the presence of Cs/ASA catalyst aliph. hydrocarbons can be formed from all the three constituents but mainly from lignin (35\% of total peak area compared to 10\% for cellulose) resulting in high quality bio-oil with 40 Mj kg-1 heating value.  On the other hand, the pyrolysis of single model compds. did not result in the aliph. hydrocarbons.  However, pyrolysis of mixt. of the model compds. yielded in aliph. hydrocarbons indicating effect of intermol. interactions such as hydrogen transfer over Cs+ ions. [on SciFinder(R)]},
	keywords = {hydrocarbon pyrolysis lignocellulose cesium promoted amorphous silica alumina catalyst},
	isbn = {0920-5861},
	author = {Zabeti, Masoud and Baltrusaitis, Jonas and Seshan, K.}
}
@article {60,
	title = {Combination of Argentophilic and Perfluorophenyl-Perfluorophenyl Interactions Supports a Head-to-Head [2 + 2] Photodimerization in the Solid State.},
	journal = {Crystal Growth \& Design},
	volume = {15},
	year = {2015},
	note = {CAPLUS AN 2014:2132397(Journal; Online Computer File)},
	month = {2015},
	pages = {538 - 541},
	publisher = {American Chemical Society},
	abstract = {Face-to-face perfluorophenyl-perfluorophenyl interactions (C6F5{\textperiodcentered}{\textperiodcentered}{\textperiodcentered}C6F5) are achieved in a disilver metal-org. complex.  The C6F5{\textperiodcentered}{\textperiodcentered}{\textperiodcentered}C6F5 interactions along with argentophilic forces support trans-pentafluorostilbazole to undergo a head-to-head [2 + 2] photodimerization to form a cyclobutane that sustains a fluorinated two-dimensional metal-org. framework. [on SciFinder(R)]},
	keywords = {combination argentophilic Perfluorophenyl interaction photodimerization solid state},
	isbn = {1528-7483},
	author = {Sinnwell, Michael A. and Baltrusaitis, Jonas and MacGillivray, Leonard R.}
}
@article {61,
	title = {Cycloexpansamines A and B: spiroindolinone alkaloids from a marine isolate of Penicillium sp. (SF-5292).},
	journal = {Journal of Antibiotics},
	volume = {68},
	year = {2015},
	note = {CAPLUS AN 2015:1911729(Journal; Online Computer File)},
	pages = {715 - 718},
	publisher = {Nature Publishing Group},
	abstract = {Cycloexpansamines A (I) and B (II) were isolated from the title fungus and characterized. [on SciFinder(R)]},
	keywords = {cycloexpansamine Penicillium},
	isbn = {0021-8820},
	author = {Lee, Chiwook and Sohn, Jae Hak and Jang, Jae-Hyuk and Ahn, Jong Seog and Oh, Hyuncheol and Baltrusaitis, Jonas and Hwang, In Hyun and Gloer, James B.}
}
@article {78,
	title = {Characterization of Plasma Polymerized Hexamethyldisiloxane Films Prepared by Arc Discharge.},
	journal = {Plasma Chemistry and Plasma Processing},
	volume = {34},
	year = {2014},
	note = {CAPLUS AN 2013:2010942(Journal; Online Computer File)},
	pages = {271 - 285},
	publisher = {Springer},
	abstract = {Herein, we present a simple method for fabricating plasma polymd. hexamethyldisiloxane films (pp-HMDSO) possessing superhydrophobic characteristics via arc discharge.  The pp-HMDSO films were deposited on a soda-lime-silica float glass using HMDSO monomer vapor as a precursor.  A detailed surface characterization was performed using SEM and at. force microscopy.  The growth process of the pp-HMDSO films was investigated as a function of deposition time from 30 to 300 s.  The non-wetting characteristics of the pp-HMDSO films were evaluated by means of contact angle (CA) measurements and correlated with the morphol. characteristics, as obtained from microscopy measurements.  The deposited films were found to be nano-structured and exhibited dual-scale roughness with the static CA values close to 170{\textdegree}.  Fourier transform IR spectroscopy anal. was carried out to investigate chem. and functional properties of these films.  Me groups were identified spectroscopically to be present within the pp-HMDSO films and were proposed to result in the low surface energy of material.  The synergy between the dual-scale roughness and low surface energy resulted in the superhydrophobic characteristics of the pp-HMDSO films.  A possible mechanism for the pp-HMDSO film formation is proposed. [on SciFinder(R)]},
	keywords = {plasma polymd hexamethyldisiloxane film arc discharge},
	isbn = {0272-4324},
	author = {Lazauskas, Algirdas and Baltrusaitis, Jonas and Grigaliunas, Viktoras and Jucius, Dalius and Guobiene, Asta and Prosycevas, Igoris and Narmontas, Pranas.}
}
@article {79,
	title = {Competitive role of structural properties of titania-silica mixed oxides and a mechanistic study of the photocatalytic degradation of phenol.},
	journal = {Applied Catalysis, B: Environmental},
	volume = {148-149},
	year = {2014},
	note = {CAPLUS AN 2014:264808(Journal; Online Computer File)},
	pages = {394 - 405},
	publisher = {Elsevier B.V.},
	abstract = {TiO2-SiO2 mixed oxide materials were hydrothermally synthesized and the photocatalytic degrdn. of phenol under UV-irradn. was evaluated.  We also demonstrated that varying the co-solvent, modulates the structural properties of the materials.  In particular, the use of non-polar co-solvents such as toluene seemed to increase the crystallinity, surface area, and pore diam. while the crystallite size of titania seemed to change little.  A comprehensive characterization using surface and bulk techniques evidenced the role of porosities, crystallinity, and Ti-O-Si linkages of the mixed oxides as significant factors that contribute to the degrdn. of phenol.  The TiO2-SiO2 mixed oxide material prepd. using only ethanol as the solvent showed 24\% degrdn. of phenol after 120 min of irradn. whereas other mixed oxide materials degraded phenol more efficiently (57\% to 100\%) in the same duration of time.  The higher photocatalytic activities of the mixed oxide materials prepd. using non-polar solvents is attributed to a combination of factors that include higher Apparent Surface Coverages of Ti-O-Si heterolinkages, larger pore sizes, and most importantly higher crystallinities of the titania phase.  Larger pore sizes enabled better transport of reactant mols. and products to and from the active sites (Ti-O-Si heterolinkages) and the higher crystallinities of the titania phase helped in minimizing the electron-hole recombination in these photocatalysts, and thus resulted in high degrdn. efficiencies. [on SciFinder(R)]},
	keywords = {structure titania silica mixed oxide photocatalysis photocatalyst phenol},
	isbn = {0926-3373},
	author = {Rasalingam, Shivatharsiny and Kibombo, Harrison S. and Wu, Chia-Ming and Peng, Rui and Baltrusaitis, Jonas and Koodali, Ranjit T.}
}
@article {99,
	title = {Coal fly ash impairs airway antimicrobial peptides and increases bacterial growth.},
	journal = {PLoS One},
	volume = {8},
	year = {2013},
	note = {CAPLUS AN 2013:396251(Journal; Online Computer File)},
	pages = {e57673},
	publisher = {Public Library of Science},
	abstract = {Air pollution is a risk factor for respiratory infections, and one of its main components is particulate matter (PM), which is comprised of a no. of particles that contain iron, such as coal fly ash (CFA).  Since free iron concns. are extremely low in airway surface liq. (ASL), we hypothesize that CFA impairs antimicrobial peptides (AMP) function and can be a source of iron to bacteria.  We tested this hypothesis in vivo by instilling mice with Pseudomonas aeruginosa (PA01) and CFA and det. the percentage of bacterial clearance.  In addn., we tested bacterial clearance in cell culture by exposing primary human airway epithelial cells to PA01 and CFA and detg. the AMP activity and bacterial growth in vitro.  We report that CFA is a bioavailable source of iron for bacteria.  We show that CFA interferes with bacterial clearance in vivo and in primary human airway epithelial cultures.  Also, we demonstrate that CFA inhibits AMP activity in vitro, which we propose as a mechanism of our cell culture and in vivo results.  Furthermore, PA01 uses CFA as an iron source with a direct correlation between CFA iron dissoln. and bacterial growth.  CFA concns. used are very relevant to human daily exposures, thus posing a potential public health risk for susceptible subjects.  Although CFA provides a source of bioavailable iron for bacteria, not all CFA particles have the same biol. effects, and their propensity for iron dissoln. is an important factor.  CFA impairs lung innate immune mechanisms of bacterial clearance, specifically AMP activity.  We expect that identifying the PM mechanisms of respiratory infections will translate into public health policies aimed at controlling, not only concn. of PM exposure, but physicochem. characteristics that will potentially cause respiratory infections in susceptible individuals and populations. [on SciFinder(R)]},
	isbn = {1932-6203},
	author = {Borcherding, Jennifer A. and Chen, Haihan and Caraballo, Juan C. and Baltrusaitis, Jonas and Pezzulo, Alejandro A. and Zabner, Joseph and Grassian, Vicki H. and Comellas, Alejandro P.}
}
@article {129,
	title = {Coal fly ash as iron source in atmospheric dust.},
	journal = {Environmental Science \& Technology},
	volume = {46},
	year = {2012},
	note = {CAPLUS AN 2012:79841(Journal; Online Computer File)},
	month = {2012///},
	pages = {2112 - 2120},
	publisher = {American Chemical Society},
	abstract = {Anthropogenic coal fly ash (FA) aerosol may represent a significant source of bioavailable iron in the open ocean.  Few measurements have been made that compare the soly. of atm. iron from anthropogenic aerosols and other sources.  We report here an investigation of iron dissoln. for three FA samples in acidic aq. solns. and compare the solubilities with that of Arizona test dust (AZTD), a ref. material for mineral dust.  The effects of pH, simulated cloud processing, and solar radiation on iron soly. have been explored.  Similar to previously reported results on mineral dust, iron in aluminosilicate phases provides the predominant component of dissolved iron.  Iron soly. of FA is substantially higher than of the cryst. minerals comprising AZTD.  Simulated atm. processing elevates iron soly. due to significant changes in the morphol. of aluminosilicate glass, a dominant material in FA particles.  Iron is continuously released into the aq. soln. as FA particles break up into smaller fragments.  These results suggest that the assessment of dissolved atm. iron deposition fluxes and their effect on the biogeochem. at the ocean surface should be constrained by the source, environmental pH, iron speciation, and solar radiation. [on SciFinder(R)]},
	keywords = {coal fly ash iron atm dust qual analysis aluminosilicate},
	isbn = {0013-936X},
	author = {Chen, Haihan and Laskin, Alexander and Baltrusaitis, Jonas and Gorski, Christopher A. and Scherer, Michelle M. and Grassian, Vicki H.}
}
@article {130,
	title = {Computational Studies of CO2 Activation via Photochemical Reactions with Reduced Sulfur Compounds.},
	journal = {Journal of Physical Chemistry A},
	volume = {116},
	year = {2012},
	note = {CAPLUS AN 2012:1254917(Journal; Online Computer File)},
	month = {2012///},
	pages = {9331 - 9339},
	publisher = {American Chemical Society},
	abstract = {Reactions between CO2 and reduced sulfur compds. (RSC), H2S and CH3SH, were investigated using ground and excited state d. functional theory (DFT) and coupled cluster (CC) methods to explore possible RSC oxidn. mechanisms and CO2 activation mechanisms in the atm. environment.  Ground electronic state calcns. at the CR-CC(2,3)/6-311+G(2df,2p)//CAM-B3LYP/6-311+G(2df,2p) level show proton transfer as a limiting step in the redn. of CO2 with activation energies of 49.64 and 47.70 kcal/mol, resp., for H2S and CH3SH.  On the first excited state surface, CR-EOMCC(2,3)/6-311+G(2df,2p)//CAM-B3LYP/6-311+G(2df,2p) calcns. reveal that energies of <250 nm are needed to form H2S-CO2 and CH3SH-CO2 complexes allowing facile hydrogen atom transfer.  Once excited, all reaction intermediates and transition states are downhill energetically showing either C-H or C-S bond formation in the excited state whereas only C-S bond formation was found in the ground state.  Environmental implications of these data are discussed with a focus on tropospheric reactions between CO2 and RSC, as well as potential for carbon sequestration using photocatalysis. [on SciFinder(R)]},
	keywords = {activation, carbon dioxide, photochem reaction, sulfur compd},
	isbn = {1089-5639},
	author = {Baltrusaitis, Jonas and Patterson, Eric V. and Hatch, Courtney.}
}
@article {149,
	title = {Carbon dioxide adsorption on oxide nanoparticle surfaces.},
	journal = {Chemical Engineering Journal (Amsterdam, Netherlands)},
	volume = {170},
	year = {2011},
	note = {CAPLUS AN 2011:672234(Journal; Online Computer File)},
	month = {2011///},
	pages = {471 - 481},
	publisher = {Elsevier B.V.},
	abstract = {In this paper, focused on environmental nanotechnol., we review some recent results for carbon dioxide (CO2) adsorption on hydroxylated Fe2O3, γ-Al2O3, and TiO2 nanoparticle surfaces at 296 K as followed by transmission FTIR spectroscopy.  In the absence of water vapor (<1\% relative humidity, RH), following exposure to CO2 different species formed on the oxide surface due to the presence of adsorption sites with different basicities.  While the majority surface species on Fe2O3, γ-Al2O3 is detd. to be adsorbed bicarbonate, on TiO2 nanoparticles bidentate carbonate was more prevalent.  A carboxylate species was obsd. on TiO2 nanoparticles under dry conditions as well.  When water is present at 40\% RH, the nature of the adsorbed CO2 species changed to that of solvated carbonate formation in the adsorbed water layer.  Obsd. initial adsorption rates were calcd. from time-course expts. under dry conditions and in the presence of 40\% RH.  When initial adsorption rates were compared between dry and wet expts., a larger value was found for dry expts. suggesting that CO2 mols. have to compete for adsorption sites with water on these nanoparticle surfaces.  As discussed here, quantum chem. calcns. provide some addnl. insights into CO2 adsorption on hydroxylated metal oxide surfaces in the presence and absence of molecularly adsorbed water. [on SciFinder(R)]},
	keywords = {carbon dioxide adsorption oxide nanoparticle surface relative humidity water},
	isbn = {1385-8947},
	author = {Baltrusaitis, Jonas and Schuttlefield, Jennifer and Zeitler, Elizabeth and Grassian, Vicki H.}
}
@article {150,
	title = {Crystal engineering rescues a solution organic synthesis in a cocrystallization that confirms the configuration of a molecular ladder.},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	year = {2011},
	note = {CAPLUS AN 2011:775876(Journal; Online Computer File)},
	month = {2011///},
	pages = {1-6, 6 pp.},
	publisher = {National Academy of Sciences},
	abstract = {Treatment of an achiral mol. ladder of C2h symmetry composed of five edge-sharing cyclobutane rings, or a [5]-ladderane, with acid results in cis- to trans-isomerization of end pyridyl groups.  Soln. NMR spectroscopy and quantum chem. calcns. support the isomerization to generate two diastereomers.  The NMR data, however, could not lead to unambiguous configurational assignments of the two isomers.  Single-crystal X-ray diffraction was employed to det. each configuration.  One isomer readily crystd. as a pure form and X-ray diffraction revealed the mol. as being achiral based on Ci symmetry.  The second isomer resisted crystn. under a variety of conditions.  Consequently, a strategy based on a cocrystn. was developed to generate single crystals of the second isomer.  Cocrystn. of the isomer with a carboxylic acid readily afforded single crystals that confirmed a chiral ladderane based on C2 symmetry.  The chiral ladderane and acid self-assembled to generate a five-component hydrogen-bonded complex that packs to form large solvent-filled homochiral channels of nanometer-scale dimensions.  Whereas cocrystns. are frequently applied to structure detns. of proteins, our study represents the first application of a cocrystn. to confirm the relative configuration of a small-mol. diastereomer generated in a soln.-phase org. synthesis. [on SciFinder(R)]},
	url = {http://www.pnas.org/cgi/reprint/1104352108v1},
	author = {Atkinson, Manza B. J. and Mariappan, S. V. Santhana and Bucar, Dejan-Kresimir and Baltrusaitis, Jonas and Friscic, Tomislav and Sinada, Naif G. and MacGillivray, Leonard R.}
}
@article {164,
	title = {Carbonic Acid Formation from Reaction of Carbon Dioxide and Water Coordinated to Al(OH)3: A Quantum Chemical Study.},
	journal = {Journal of Physical Chemistry A},
	volume = {114},
	year = {2010},
	note = {CAPLUS AN 2010:112419(Journal)},
	month = {2010///},
	pages = {2350 - 2356},
	publisher = {American Chemical Society},
	abstract = {D. functional and ab initio calcns. have been performed on CO2-nH2O and Al(OH)3-CO2-nH2O (where n = 1, 2, 3) cluster models to elucidate the catalytic effect of a hydroxylated metal center on the formation of carbonic acid (H2CO3).  B3LYP/6-311++G(d,p)-calcd. geometries and RI-SCS-MP2/aug-cc-pVTZ//B3LYP/6-311++G(d,p)-calcd. energies with respect to isolated gas-phase mols. and various H2O, CO2, and H2CO3-Al(OH)3 complexes are presented.  It is shown here that H2CO3 formation proceeds via direct CO2 and nH2O reaction with very high activation barriers in the gas phase, 51.40, 29.64, and 19.84 kcal/mol for CO2-H2O, CO2-2H2O, and CO2-3H2O clusters, resp., decreasing in magnitude with an increase in the no. of H2O mols.  The energetics as well as the reaction mechanism and energy landscape change significantly when carbonic acid is formed from CO2 and nH2O in the presence of Al(OH)3, a hydroxylated metal center.  Results presented here show important details of the influence of the coordinating metal center in the formation of H2CO3. [on SciFinder(R)]},
	keywords = {carbonic acid formation quantum chem, reaction carbon dioxide water coordinated aluminum hydroxide quantum chem},
	isbn = {1089-5639},
	author = {Baltrusaitis, Jonas and Grassian, Vicki H.}
}
@article {173,
	title = {Calcite ( 1 0 1 4 ) surface in humid environments.},
	journal = {Surface Science},
	volume = {603},
	year = {2009},
	note = {CAPLUS AN 2009:1033091(Journal)},
	month = {2009///},
	pages = {L99-L104},
	publisher = {Elsevier B.V.},
	abstract = {A.c. mode At. Force Microscopy (AFM) height images combined with force measurements and phase imaging were used to investigate the surface reconstruction and chem. of the lowest energy surface, ( 1 0 1 4 ) plane, of calcite, a stable form of calcium carbonate (CaCO3), in the presence of relative humidity at different temps.  At 296 K and 70\% RH, calcite ( 1 0 1 4 ) undergoes rapid restructuring during hydration forming regions on the surface that are most likely characterized as an amorphous hydrate layer similar to what forms in soln. under high [Ca2+] supersatn. conditions.  This hydrate layer in turn serves as a substrate for the crystn. of another layer that possesses structural properties which differ from hydrate layer.  Phase imaging reveals that these different layer structures formed in the process of water adsorption and surface reconstruction have very different energy dissipation modes.  The origin of the different dissipation modes are likely due to differences in water content and hydrophobicity of these regions.  The newly formed layer on top of the hydration layer is proposed to be vaterite, another polymorph of CaCO3.  At 278 K the formation mechanism of the vaterite layer changes due to nucleation of a more cryst. hydrate layer, similar to CaCO3 hexahydrate, instead of the amorphous hydrate layer that forms at 296 K.  Force measurements corroborate the assignment of the speciation of different regions on the surface.  Importantly, the AFM data show that the surface of calcite is highly inhomogeneous with regions that vary in water content.  The reactivity of calcite in humid environments will be highly spatially dependent. [on SciFinder(R)]},
	keywords = {calcite surface humidity hydration vaterite nucleation},
	isbn = {0039-6028},
	author = {Baltrusaitis, Jonas and Grassian, Vicki H.}
}
@article {180,
	title = {Characterization and acid-mobilization study of iron-containing mineral dust source materials.},
	journal = {Journal of Geophysical Research, [Atmospheres]},
	volume = {113},
	year = {2008},
	note = {CAPLUS AN 2008:617952(Journal)},
	month = {2008///},
	pages = {D05202/1-D05202/18},
	publisher = {American Geophysical Union},
	abstract = {Processes that solubilize iron in mineral dust aerosol may increase the amt. of iron supplied to ocean surface waters, and thereby stimulate phytoplankton productivity.  In particular, the uptake of acids such as H2SO4 and HNO3 on mineral dust surfaces can produce extremely acidic environments that promote iron dissoln.  Here, four samples that represent source materials for mineral dust (Saudi Beach sand (SB), Inland Saudi sand (IS), Saharan Sand (SS) and China Loess (CL)) and one com. ref. material (Arizona Test Dust (AZTD)) were characterized, and examd. in dissoln. studies in solns. of sulfuric, nitric and hydrochloric acid ranging from pH 1 to 3.  Mossbauer spectroscopy revealed Fe(III) in all samples, whereas SB, CL and AZTD also contained appreciable Fe(II).  Spectra suggest that both Fe(II) and Fe(III) were substituted into aluminosilicates, although CL, AZTD and IS also contained Fe(III) oxide phases.  Total iron soly. measured after 24 h ranged between 4-16\% of the initial iron content for each material, but did not scale with either the sp. surface area or the total iron content of the samples.  Instead, we show that Fe(II)-contg. solid phases such as Fe(II)-substituted aluminosilicates represent a significant, and sometimes dominant, source of sol. Fe in acidic environments.  Results of dissoln. studies also show that the nature of the acid influences iron solubilization, as elevated concns. of nitrate encountered from nitric acid at pH 1 suppressed Fe(II) formation.  We propose a surface-mediated, non-photochem. redox reaction between nitrate and Fe(II), which may contribute to Fe(II)/Fe(III) cycling in the atm. [on SciFinder(R)]},
	keywords = {iron mineral dust source material acid mobilization},
	author = {Cwiertny, David M. and Baltrusaitis, Jonas and Hunter, Gordon J. and Laskin, Alexander and Scherer, Michelle M. and Grassian, Vicki H.}
}
@conference {183,
	title = {Chemical properties of oxide nanoparticles: surface adsorption studies from gas- and liquid-phase environments.},
	booktitle = {Synthesis, Properties, Applications of Oxide Nanomaterials},
	year = {2007},
	note = {CAPLUS AN 2007:1408672(Conference; General Review)},
	month = {2007///},
	pages = {335 - 351},
	publisher = {John Wiley \& Sons, Inc.},
	organization = {John Wiley \& Sons, Inc.},
	abstract = {A review.  This article is to describe the potential use of ATR-FTIR spectroscopy, which is somewhat unique in that surface adsorption can be investigated at both the nanoparticle oxide/gas and nanoparticle oxide/liq. interfaces.  The mol. nature of oxide nanoparticle surfaces will most likely be different in these two phases.  The quantification of surface adsorption as a function of size could be done with this technique under these different conditions.  The results should be revealing and may provide addnl. insight into the chem. properties of oxide nanoparticles. [on SciFinder(R)]},
	keywords = {review oxide nanoparticle surface adsorption ATR FTIR spectroscopy interface},
	author = {Pettibone, John M. and Baltrusaitis, Jonas and Grassian, Vicki H.}
}
