Associate Professor of Chemistry
aulta@umich.eduOffice Information:
4545 Chemistry
phone: 734.763.2283
Imaging & Spectroscopy; Physical Chemistry; Analytical Chemistry; Energy & Environmental Chemistry; Chemistry; Macromolecular Nanochemistry; Materials Chemistry
Education/Degree:
University of Iowa, PostDocUniversity of British Columbia, PostDoc
University of California, San Diego, PhD
Carleton College, BA
About
| Research Fields | Research Topics | Research Tools |
| Analytical Chemistry Physical Chemistry Environmental Chemistry Atmospheric Chemistry |
Atmospheric Aerosols (Climate and Health) |
Raman Microspectroscopy Optical Photothermal Infrared Spectroscopy (O-PTIR) Atomic Force Microscopy (w/PTIR and Thermal Analysis) Electron Microscopy Single Particle Mass Spectrometry X-ray Micorscopy/Spectroscopy (STXM/NEXAFS) |
The Ault Laboratory, an analytical and physical chemistry laboratory, uses spectroscopic and microscopic approaches to study complex environmental systems, with a focus on atmospheric aerosols, as well as indoor surfaces and engineered nanoparticles. Atmospheric aerosols, 1 nm – 20 µm particles suspended in the atmosphere, represent a challenging system for analytical measurements due to small volumes, complex chemical composition, high ionic strengths, complex surface chemistry, poorly understood interfaces between phases, and continuous evolution through heterogeneous and multiphase chemistry. However, understanding the complex chemistry occurring within aerosols is essential as they are responsible for ~10 % of global deaths annually. Aerosols also represent the greatest uncertainty in predicting future climate, due to impacts on radiative transfer through scattering and absorption of solar radiation, as well as modification of cloud properties and precipitation.
To address these challenges the Ault Group uses spectroscopy to probe model systems for SOA and atmospheric particles to gain insight into their fundamental physicochemical behavior. Specific foci include 1) direct measurements of aerosol acidity, 2) molecular characterization and development of novel methods for measuring aerosol composition, and 3) determining the impact of aerosol phase on heterogeneous and multiphase chemistry. Beyond aerosols, we have expanded to other important systems, including indoor surfaces and engineered nanoparticles. We use a range of spectroscopic and microscopic methods, with a focus on vibrational spectroscopy, to investigate individual particles. Our approach of integrating different spectroscopic methods for single particle analysis is unique and allows us to gain insight into the stochastic nature of particle evolution in the atmosphere.
Award(s)
- “Top 40 Under 40” Power List by the Analytical Scientist, 2018
- Sloan Foundation Research Fellow – Chemistry, 2018
- National Science Foundation CAREER Award - Chemistry Division, Environmental Chemical Sciences Program, 2017
- Department of Energy Graduate Research Environmental Fellowship, 2009
- American Chemical Society I.M. Kolthoff Award, Analytical Division, 2005
- University of California- San Diego Urey Fellowship, 2005
Representative Publications
Bold = Ault Group, * denotes corresponding/senior author; Co-first authors = †
59. Olson, N. E.G; Lei, Z.G; Craig, R. L.G; Zhang, Y.; Chen, Y.; Lambe, A. T.; Zhang, Z.; Gold, A., Surratt, J. D., Ault, A. P.* Reactive Uptake of Isoprene Epoxydiols Increases the Viscosity of the Core of Phase-Separated Aerosol Particles, invited submission to special issue on “New Advances in Organic Aerosol Chemistry”, ACS Earth and Space Chemistry, 2019.
55. Riemer, N.*; Ault, A. P.*; West, M.; Craig, R. E.G; Curtis, J. H., Aerosol Mixing State: Measurements, Modeling, and Impacts, Reviews of Geophysics, 2019, in press, DOI: 10.1029/2018RG000615.
EOS Article about Review: "The Diversity and Complexity of Atmospheric Aerosol"
54. Slade, J. H.*; Ault, A. P.*; Bui, A. T.; Ditto, J. C.; Lei, Z.G; Bondy, A. L.G; Olson, N. E.G; Cook, R. D.; Desrochers, S. J.; Harvey, R. M.; Erickson, Wallace, H. W.; Alvarez, S. L.; Flynn, J. H.; Boor, B. E.; Petrucci, G. A.; Gentner, D. R.; Griffin, R. J.; Shepson, P. B., Bouncier Particles at Night: Composition and Temperature Drive Diel Variations in the Phase State of Atmospheric Aerosol in a Mixed Forest, Environmental Science and Technology, 2019, 53(9), 4977-4987.
53. Tirella, P. N.U; Craig, R. L.G; Tubbs, D. B.H/U; Ault, A. P.* Extending surface enhanced Raman spectroscopy (SERS) of atmospheric aerosol particles to the accumulation mode (150–800 nm) special issue of Environmental Science: Processes and Impacts, 2018, 20, 1570-1580.
51. Craig, R. L. and Ault, A. P.* “Aerosol Acidity: Direct Measurement from a Spectroscopic Method” Chapter 9 in ACS eBook Multiphase Environmental Chemistry in the Atmosphere (Peer-Reviewed), 2018, DOI: 10.1021/bk-2018-1299.ch009 .
50. Craig, R. L.G; Peterson, P. K.; Nandy, L.; Lei, Z.G; Hossain, M. A.H; Camarena, S.H; Dodson, R. A.G; Cook, R. D.; Dutcher, C. S.; Ault, A. P.* Direct Determination of Aerosol pH: Size-Resolved Measurements of Submicron and Supermicron Aqueous Particles, Analytical Chemistry, 2018, 90(19), 11232–11239 .
49. Bondy, A. L.G; Bonanno, D.; Moffet, R. C.; Wang, B.; Laskin, A.; Ault, A. P.* Diverse Chemical Mixing States of Aerosol Particles in the Southeastern United States, Atmospheric Chemistry and Physics, 2018, 18(16): 12595-12612.
48. May, N. W.; Gunsch, M. J.; Olson, N. E.G; Bondy, A. L.G; Kirpes, R. M.; Bertman, S. B.; Swarup, C.; Laskin, A.; Hopke, P. K.; Ault, A. P.*; Pratt, K. A.* Unexpected contributions of sea spray and lake spray aerosol to inland particulate matter, Environmental Science and Technology Letters, 2018, 5 (7), 405–412.
46. Zhang, Y.; Chen, Y.; Lambe, A. T.; Olson, N. E.G; Lei, Z.G; Craig, R. L.G; Zhang, Z.; Gold, A.; Onash, T. B.; Jayne, J. T.; Worsnop, D. R.; Gaston, C. J. ; Thornton, J. A.; Vizuete, W.. Ault, A. P.*; Surratt, J. D.* Effect of Aerosol-Phase State on Secondary Organic Aerosol Formation from the Reactive Uptake of Isoprene-Derived Epoxydiols (IEPOX), Environmental Science and Technology Letters, 2018, 5 (3), 167–174.
43. Bondy, A. L.G; Craig, R. L.G; Zhang, Z.; Gold, A.; Surratt, J. D.; Ault, A. P.* Isoprene-derived organosulfates: Vibrational mode analysis by Raman spectroscopy, acidity-dependent spectral modes, and observation in individual atmospheric particles, Journal of Physical Chemistry A, 2018, 122 (1), 303-315.
42. May, N. W.; Olson, N. E.G; Panas, M.; Axson, J. L.P; Tirella, P. S.U; Kirpes, R. M.; Craig, R. L.G; Gunsch, M. J.; China, S.; Laskin, A.; Ault, A. P.*; Pratt, K. A.*Aerosol Emissions from Great Lakes Harmful Algal Blooms, Environmental Science & Technology, 2018, 52 (2), 397-405.
Michigan Press Release Issues of the Environment (WEMU) Interview with Prof. Ault (article with audio)Michigan Radio Environment Report (WUOM) Interview with Prof. Ault (article) (interview - first minute)WCMU InterviewArticle in Popular Science
41. Bondy, A. L.G; Kirpes, R. M.; Merzel, R. L.; Pratt, K. A.; Banaszak Holl, M. M.; Ault, A. P.* Atomic Force Microscopy-Infrared Spectroscopy of Individual Atmospheric Aerosol Particles: Sub-Diffraction Limit Vibrational Spectroscopy and Morphological Analysis, Analytical Chemistry, 2017, 89, (17), 8594-8598.
40. Bondy, A. L.G; Wang, B.; Laskin, A.; Craig, R. L.G; Nhliziyo, M. V; Bertman, S. B.; Pratt, K. A.; Shepson, P. B.; Ault, A. P.* Inland Sea Spray Aerosol Transport and Incomplete Chloride Depletion: Varying Degrees of Reactive Processing Observed during SOAS. Environmental Science and Technology, 2017, 51 (17), 9533–9542.
39. Craig, R. L.G; Nandy, L.; Axson, J. L.P; Dutcher, C. S.; Ault, A. P.*; SpectroscopicDetermination of Aerosol pH from Acid-Base Equilibria in Inorganic, Organic,and Mixed Systems, Journal of Physical Chemistry – A, (Veronica Vaida Festschrift), 2017, 121(30), 5690-5699.
38. Craig, R. L.G; Bondy, A. L.G; Ault, A. P.* Computer-Controlled Raman Microspectroscopy (CC-Raman): A Method for the Rapid Characterization of Individual Atmospheric Aerosol Particles, Aerosol Science & Technology, DOI: 10.1080/02786826.2017.1337268, in press.
Article chosen for the "AS&T Article Highlight" in AAAR Summer 2017 issue of Particulars (link, pdf).
37. Ault, A. P.* and Axson, J. L.P; Atmospheric Aerosol Chemistry: Spectroscopic and Microscopic Advances; Analytical Chemistry, 2017, 89, (1), 430-452. Included in the special issue "Fundamental and Applied Reviews in Analytical Chemistry 2017".
36. Ault, A. P.*, Stark, D. I.G; Axson, J. L.P, Keeney, J. N.U; Bergin, I. L.; Philbert, M. A.; Maynard, A. D.; Influence of Pepsin on AgNP Dissolution and Aggregation in an Artificial Stomach Model. Environmental Science: Nano, 2016, 3, 1510 - 1520.
35. Axson, J. L.P, May, N. W.; Colon-Bernal, I. D.G; Pratt, K. A.*; Ault, A. P.* Lake spray aerosol: a chemical signature from individual ambient particles. Environmental Science and Technology, 2016, 50(18), 9835-9845.
Work highlight in article in Grand Traverse Record Eagle.
34. May, N. W.; Axson, J. L.P; Watson, A.; Pratt, K. A.*; and Ault, A. P.* Lake spray aerosol generation: A method for producing representative particles from freshwater wave breaking. Atmospheric Measurement Techniques,2016, 9 (9), 4311-4325.
33. Creamean, J. M.*; Axson, J. L.P; Bondy, A. L.G; Craig, R. L.G; May, N. W.;Shen, H.G; Weber, M. H.; Pratt, K. A.; and Ault, A. P.* Insights into aerosol-cloud-precipitation interactions from physicochemical characterization of insoluble residues in Sierra Nevada snow. Journal of Geophysical Research – Atmospheres, 121(12): 2015JD024700.
32. Shen, H.G; Peters, T. M.; Casuccio, G. S.; Lersch, T. L.; West, R. R.; Kumar, A.; Kumar, N.; Ault, A. P.* Individual Particle Analysis of Lead-rich Particulate Matter in New Delhi, India. Environmental Science and Technology 2016, 50(10): 4961-4970.
Press Release from: Michigan News; Media: Hindustan Times, Governance Now
30. Axson, J. L.P; Shen, H.G;Bondy, A. L.G; Landry, C. C.; Weltz, J.; Creamean, J. M.*; Ault, A. P.* Transported Mineral Dust Deposition at a Hydrologically Sensitive Mountain Site: Size and Composition Shifts Observed in Ambient Aerosol and Snowpack. “Special Issue on Atmospheric Chemistry and Physics at Mountain Sites” in Aerosol and Air Quality Research; 2016, 16(3), 555-567.
29. Rindelaub, J. D.†; Craig, R. L.†,G; Nandy, L.; Bondy, A. L.G; Dutcher, C. S.; Shepson, P. B. Ault, A. P.*Direct Measurement of pH in Individual Particles via Raman Microspectroscopy and Variation in Acidity with Relative Humidity. Journal of Physical Chemistry - A, 2016, 120(6), 911-917.
Included in Virtual Issue on top papers in Atmospheric Physical Chemistry from 2013-2016 in the Journal of Physical Chemistry - A, link.
28. Axson, J. L.P; Stark, D. I.G; Bondy, A. L.G; Capracotta, S. S.; Maynard, A. D.; Philbert, M. A.; Bergin, I. L.; Ault, A. P.* Rapid Kinetics of Silver Nanoparticle Dissolution and Growth in Simulated Gastric Fluid: Size and coating Dependent Effects. Journal of Physical Chemistry - C, 2015, 119(35), 20632-20641.
27. Craig, R. L.G; Bondy, A. L.G; Ault, A.P.* Surface Enhanced Raman Spectroscopy (SERS) of Atmospheric Aerosol Particles: Enhanced Detection of Organic and Inorganic Species in Individual Particles. Analytical Chemistry, 2015, 87 (15), 7510–7514.
25. Axson, J. L.P; Creamean, J. M.; Bondy, A. L.G; Warner, K. Y.; Ault, A. P.* An in situ method for sizing insoluble residues in precipitation. Aerosol Science & Technology, 2015, 49(1), 24-34.
About
| Research Fields | Research Topics | Research Tools |
| Analytical Chemistry Physical Chemistry Environmental Chemistry Atmospheric Chemistry |
Atmospheric Aerosols (Climate and Health) |
Raman Microspectroscopy Optical Photothermal Infrared Spectroscopy (O-PTIR) Atomic Force Microscopy (w/PTIR and Thermal Analysis) Electron Microscopy Single Particle Mass Spectrometry X-ray Micorscopy/Spectroscopy (STXM/NEXAFS) |
The Ault Laboratory, an analytical and physical chemistry laboratory, uses spectroscopic and microscopic approaches to study complex environmental systems, with a focus on atmospheric aerosols, as well as indoor surfaces and engineered nanoparticles. Atmospheric aerosols, 1 nm – 20 µm particles suspended in the atmosphere, represent a challenging system for analytical measurements due to small volumes, complex chemical composition, high ionic strengths, complex surface chemistry, poorly understood interfaces between phases, and continuous evolution through heterogeneous and multiphase chemistry. However, understanding the complex chemistry occurring within aerosols is essential as they are responsible for ~10 % of global deaths annually. Aerosols also represent the greatest uncertainty in predicting future climate, due to impacts on radiative transfer through scattering and absorption of solar radiation, as well as modification of cloud properties and precipitation.
To address these challenges the Ault Group uses spectroscopy to probe model systems for SOA and atmospheric particles to gain insight into their fundamental physicochemical behavior. Specific foci include 1) direct measurements of aerosol acidity, 2) molecular characterization and development of novel methods for measuring aerosol composition, and 3) determining the impact of aerosol phase on heterogeneous and multiphase chemistry. Beyond aerosols, we have expanded to other important systems, including indoor surfaces and engineered nanoparticles. We use a range of spectroscopic and microscopic methods, with a focus on vibrational spectroscopy, to investigate individual particles. Our approach of integrating different spectroscopic methods for single particle analysis is unique and allows us to gain insight into the stochastic nature of particle evolution in the atmosphere.
Award(s)
- “Top 40 Under 40” Power List by the Analytical Scientist, 2018
- Sloan Foundation Research Fellow – Chemistry, 2018
- National Science Foundation CAREER Award - Chemistry Division, Environmental Chemical Sciences Program, 2017
- Department of Energy Graduate Research Environmental Fellowship, 2009
- American Chemical Society I.M. Kolthoff Award, Analytical Division, 2005
- University of California- San Diego Urey Fellowship, 2005
Representative Publications
Bold = Ault Group, * denotes corresponding/senior author; Co-first authors = †
59. Olson, N. E.G; Lei, Z.G; Craig, R. L.G; Zhang, Y.; Chen, Y.; Lambe, A. T.; Zhang, Z.; Gold, A., Surratt, J. D., Ault, A. P.* Reactive Uptake of Isoprene Epoxydiols Increases the Viscosity of the Core of Phase-Separated Aerosol Particles, invited submission to special issue on “New Advances in Organic Aerosol Chemistry”, ACS Earth and Space Chemistry, 2019.
55. Riemer, N.*; Ault, A. P.*; West, M.; Craig, R. E.G; Curtis, J. H., Aerosol Mixing State: Measurements, Modeling, and Impacts, Reviews of Geophysics, 2019, in press, DOI: 10.1029/2018RG000615.
EOS Article about Review: "The Diversity and Complexity of Atmospheric Aerosol"
54. Slade, J. H.*; Ault, A. P.*; Bui, A. T.; Ditto, J. C.; Lei, Z.G; Bondy, A. L.G; Olson, N. E.G; Cook, R. D.; Desrochers, S. J.; Harvey, R. M.; Erickson, Wallace, H. W.; Alvarez, S. L.; Flynn, J. H.; Boor, B. E.; Petrucci, G. A.; Gentner, D. R.; Griffin, R. J.; Shepson, P. B., Bouncier Particles at Night: Composition and Temperature Drive Diel Variations in the Phase State of Atmospheric Aerosol in a Mixed Forest, Environmental Science and Technology, 2019, 53(9), 4977-4987.
53. Tirella, P. N.U; Craig, R. L.G; Tubbs, D. B.H/U; Ault, A. P.* Extending surface enhanced Raman spectroscopy (SERS) of atmospheric aerosol particles to the accumulation mode (150–800 nm) special issue of Environmental Science: Processes and Impacts, 2018, 20, 1570-1580.
51. Craig, R. L. and Ault, A. P.* “Aerosol Acidity: Direct Measurement from a Spectroscopic Method” Chapter 9 in ACS eBook Multiphase Environmental Chemistry in the Atmosphere (Peer-Reviewed), 2018, DOI: 10.1021/bk-2018-1299.ch009 .
50. Craig, R. L.G; Peterson, P. K.; Nandy, L.; Lei, Z.G; Hossain, M. A.H; Camarena, S.H; Dodson, R. A.G; Cook, R. D.; Dutcher, C. S.; Ault, A. P.* Direct Determination of Aerosol pH: Size-Resolved Measurements of Submicron and Supermicron Aqueous Particles, Analytical Chemistry, 2018, 90(19), 11232–11239 .
49. Bondy, A. L.G; Bonanno, D.; Moffet, R. C.; Wang, B.; Laskin, A.; Ault, A. P.* Diverse Chemical Mixing States of Aerosol Particles in the Southeastern United States, Atmospheric Chemistry and Physics, 2018, 18(16): 12595-12612.
48. May, N. W.; Gunsch, M. J.; Olson, N. E.G; Bondy, A. L.G; Kirpes, R. M.; Bertman, S. B.; Swarup, C.; Laskin, A.; Hopke, P. K.; Ault, A. P.*; Pratt, K. A.* Unexpected contributions of sea spray and lake spray aerosol to inland particulate matter, Environmental Science and Technology Letters, 2018, 5 (7), 405–412.
46. Zhang, Y.; Chen, Y.; Lambe, A. T.; Olson, N. E.G; Lei, Z.G; Craig, R. L.G; Zhang, Z.; Gold, A.; Onash, T. B.; Jayne, J. T.; Worsnop, D. R.; Gaston, C. J. ; Thornton, J. A.; Vizuete, W.. Ault, A. P.*; Surratt, J. D.* Effect of Aerosol-Phase State on Secondary Organic Aerosol Formation from the Reactive Uptake of Isoprene-Derived Epoxydiols (IEPOX), Environmental Science and Technology Letters, 2018, 5 (3), 167–174.
43. Bondy, A. L.G; Craig, R. L.G; Zhang, Z.; Gold, A.; Surratt, J. D.; Ault, A. P.* Isoprene-derived organosulfates: Vibrational mode analysis by Raman spectroscopy, acidity-dependent spectral modes, and observation in individual atmospheric particles, Journal of Physical Chemistry A, 2018, 122 (1), 303-315.
42. May, N. W.; Olson, N. E.G; Panas, M.; Axson, J. L.P; Tirella, P. S.U; Kirpes, R. M.; Craig, R. L.G; Gunsch, M. J.; China, S.; Laskin, A.; Ault, A. P.*; Pratt, K. A.*Aerosol Emissions from Great Lakes Harmful Algal Blooms, Environmental Science & Technology, 2018, 52 (2), 397-405.
Michigan Press Release Issues of the Environment (WEMU) Interview with Prof. Ault (article with audio)Michigan Radio Environment Report (WUOM) Interview with Prof. Ault (article) (interview - first minute)WCMU InterviewArticle in Popular Science
41. Bondy, A. L.G; Kirpes, R. M.; Merzel, R. L.; Pratt, K. A.; Banaszak Holl, M. M.; Ault, A. P.* Atomic Force Microscopy-Infrared Spectroscopy of Individual Atmospheric Aerosol Particles: Sub-Diffraction Limit Vibrational Spectroscopy and Morphological Analysis, Analytical Chemistry, 2017, 89, (17), 8594-8598.
40. Bondy, A. L.G; Wang, B.; Laskin, A.; Craig, R. L.G; Nhliziyo, M. V; Bertman, S. B.; Pratt, K. A.; Shepson, P. B.; Ault, A. P.* Inland Sea Spray Aerosol Transport and Incomplete Chloride Depletion: Varying Degrees of Reactive Processing Observed during SOAS. Environmental Science and Technology, 2017, 51 (17), 9533–9542.
39. Craig, R. L.G; Nandy, L.; Axson, J. L.P; Dutcher, C. S.; Ault, A. P.*; SpectroscopicDetermination of Aerosol pH from Acid-Base Equilibria in Inorganic, Organic,and Mixed Systems, Journal of Physical Chemistry – A, (Veronica Vaida Festschrift), 2017, 121(30), 5690-5699.
38. Craig, R. L.G; Bondy, A. L.G; Ault, A. P.* Computer-Controlled Raman Microspectroscopy (CC-Raman): A Method for the Rapid Characterization of Individual Atmospheric Aerosol Particles, Aerosol Science & Technology, DOI: 10.1080/02786826.2017.1337268, in press.
Article chosen for the "AS&T Article Highlight" in AAAR Summer 2017 issue of Particulars (link, pdf).
37. Ault, A. P.* and Axson, J. L.P; Atmospheric Aerosol Chemistry: Spectroscopic and Microscopic Advances; Analytical Chemistry, 2017, 89, (1), 430-452. Included in the special issue "Fundamental and Applied Reviews in Analytical Chemistry 2017".
36. Ault, A. P.*, Stark, D. I.G; Axson, J. L.P, Keeney, J. N.U; Bergin, I. L.; Philbert, M. A.; Maynard, A. D.; Influence of Pepsin on AgNP Dissolution and Aggregation in an Artificial Stomach Model. Environmental Science: Nano, 2016, 3, 1510 - 1520.
35. Axson, J. L.P, May, N. W.; Colon-Bernal, I. D.G; Pratt, K. A.*; Ault, A. P.* Lake spray aerosol: a chemical signature from individual ambient particles. Environmental Science and Technology, 2016, 50(18), 9835-9845.
Work highlight in article in Grand Traverse Record Eagle.
34. May, N. W.; Axson, J. L.P; Watson, A.; Pratt, K. A.*; and Ault, A. P.* Lake spray aerosol generation: A method for producing representative particles from freshwater wave breaking. Atmospheric Measurement Techniques,2016, 9 (9), 4311-4325.
33. Creamean, J. M.*; Axson, J. L.P; Bondy, A. L.G; Craig, R. L.G; May, N. W.;Shen, H.G; Weber, M. H.; Pratt, K. A.; and Ault, A. P.* Insights into aerosol-cloud-precipitation interactions from physicochemical characterization of insoluble residues in Sierra Nevada snow. Journal of Geophysical Research – Atmospheres, 121(12): 2015JD024700.
32. Shen, H.G; Peters, T. M.; Casuccio, G. S.; Lersch, T. L.; West, R. R.; Kumar, A.; Kumar, N.; Ault, A. P.* Individual Particle Analysis of Lead-rich Particulate Matter in New Delhi, India. Environmental Science and Technology 2016, 50(10): 4961-4970.
Press Release from: Michigan News; Media: Hindustan Times, Governance Now
30. Axson, J. L.P; Shen, H.G;Bondy, A. L.G; Landry, C. C.; Weltz, J.; Creamean, J. M.*; Ault, A. P.* Transported Mineral Dust Deposition at a Hydrologically Sensitive Mountain Site: Size and Composition Shifts Observed in Ambient Aerosol and Snowpack. “Special Issue on Atmospheric Chemistry and Physics at Mountain Sites” in Aerosol and Air Quality Research; 2016, 16(3), 555-567.
29. Rindelaub, J. D.†; Craig, R. L.†,G; Nandy, L.; Bondy, A. L.G; Dutcher, C. S.; Shepson, P. B. Ault, A. P.*Direct Measurement of pH in Individual Particles via Raman Microspectroscopy and Variation in Acidity with Relative Humidity. Journal of Physical Chemistry - A, 2016, 120(6), 911-917.
Included in Virtual Issue on top papers in Atmospheric Physical Chemistry from 2013-2016 in the Journal of Physical Chemistry - A, link.
28. Axson, J. L.P; Stark, D. I.G; Bondy, A. L.G; Capracotta, S. S.; Maynard, A. D.; Philbert, M. A.; Bergin, I. L.; Ault, A. P.* Rapid Kinetics of Silver Nanoparticle Dissolution and Growth in Simulated Gastric Fluid: Size and coating Dependent Effects. Journal of Physical Chemistry - C, 2015, 119(35), 20632-20641.
27. Craig, R. L.G; Bondy, A. L.G; Ault, A.P.* Surface Enhanced Raman Spectroscopy (SERS) of Atmospheric Aerosol Particles: Enhanced Detection of Organic and Inorganic Species in Individual Particles. Analytical Chemistry, 2015, 87 (15), 7510–7514.
25. Axson, J. L.P; Creamean, J. M.; Bondy, A. L.G; Warner, K. Y.; Ault, A. P.* An in situ method for sizing insoluble residues in precipitation. Aerosol Science & Technology, 2015, 49(1), 24-34.
