Faculty and Staff

Scott Darveau

Scott Darveau

Professor, Department Chair
Chemistry
Bruner Hall , 419
(308) 865-8491
darveausa@unk.edu

Welcome to my virtual office.  You can drop by to see me in my real office anytime Monday through Friday.  I am usually somewhere around the department between 8:00 a.m and 5:00 p.m.  You can email me at darveausa@unk.edu or just click on the link.  Or, you can call me at the above number.

Education
Ph.D., Physical Chemistry, University of Chicago, 1998
B.S., Chemistry, University of Nebraska Lincoln, 1992

Recent Courses
Chemistry 160 - General Chemistry I

Chemistry 160L - General Chemistry I Lab

Chemistry 161 - General Chemistry II

Chemistry 161L - General Chemistry II Lab

Chemistry 480 - Physical Chemistry I

Chemistry 481 - Physical Chemistry II

  •  “Thin Films Formed by Selenization of CuInxB1-x Precursors in Se Vapor” C. Kamler, N.J. Ianno, J. Huguenin-Love, R.J. Soukup, J. Olejnicek, S.A. Darveau, C.L. Exstrom, Solar Energy Materials and Solar Cells, submitted Sep 2007
  • “Electron-atom superelastic scattering in magnesium at milli-electron volt energies” T. Baynard, A.C. Reber , R.F. Niedziela, S.A. Darveau, B. Prutzman, R. S. Berry, J. Phys. Chem,. accepted for publication Sep 2007 in J. Chem. Phys.
  • "Copper-Indium-Boron-Diselenide Absorber Materials," Ianno, N.J.; Soukup, R.J.; Exstrom, C.L. ; Darveau, S.A.. Material Research Society Symposium Proceedings2007,1012 Y03.21.
  • “Thin Films of GeC Deposited Using a Unique Hollow Cathode Sputtering Technique”  R.J. Soukup, N.J. Ianno, J.S. Schrader, C.L. Exstrom, S.A. Darveau, R.N. Udey, V.L. Dalal, Solar Energy Materials and Solar Cells,200690, 2338-2345.
  • “Thin Films of A-SiGe:H With Device Quality Properties Prepared By a Novel Hollow Cathode Deposition Technique”  Soukup, R.J., Ianno, N.J., Darveau, S.A., Exstrom, C.L., Solar Energy Materials and Solar Cells200587, 87-98.
  • "Optical and Electronic Characterization of a-SiGe:H Thin Films Prepared by a Novel Hollow Cathode Deposition Technique," Soukup, R.J.; Ianno, N.J.; Darveau, S.A.; Exstrom, C.L.. Material Research Society Symposium Proceedings2004,808, A9.4.1.
  • “A Modular Laser Apparatus for Polarimetry, Nephelometry, and Fluorimetry in General Chemistry”.  Scott A. Darveau, Jessica Mueller, April Vaverka, Cheri Barta, Anthony Fitch, Jessica Jurzenski, and Yvonne Gindt, J. Chem. Educ.81 (3) 401-405. (March 2003)
  • “Superelastic Collisions [e+Mg*] Following Resonant, 2-Photon Ionization of Mg Atoms”, S. A.Darveau and R. S. Berry, Proceedings of the Ninth International Symposium on Resonance Ionization Spectroscopy, Ed. by J. C. Vickerman, 1. Lyon, N. P. Lockyer, and J. E. Parks, American Institute of Physics, 1998, p. 253.
  • Student Solutions Manual for Chemistry: The Practical Science, P. Kelter and M. Mosher, Houghton-Mifflin, 2007.
  • Instructor’s Solutions Manual for Chemistry:The Practical Science, P.Kelter and M. Mosher, Houghton-Mifflin, 2007.

“Characterization of Thin-Film GeC Fabricated by a Hollow-Cathode Plasma Jet Deposition Method,” Ruth N. Udey, Scott A. Darveau, Christopher L. Exstrom, at the 2006 National Conference on Undergraduate Research, April 2006.

 “Characterization of Thin-Film GeC Fabricated by a Hollow-Cathode Plasma Jet Deposition Method,” Ruth N. Udey, Scott A. Darveau, Christopher L. Exstrom, at the 2006 UNK Student Research Day, April 2006.

“Characterization of Thin-Film GeC Fabricated by a Hollow-Cathode Plasma Jet Deposition Method,” Ruth Udey, Christopher L. Exstrom, Scott A. Darveau, Rodney J. Soukup, and Natale J. Ianno, at the 40thMidwest Regional Meeting of the American Chemical Society, Joplin, Missouri, October, 2005

“Apparatus Setup and Determination of Rate Constants for Fluorescence Quenching of Porphyrins”, K. Kincaid and S. Darveau at Student Research Day, UNK, Kearney, Nebraska, April 2003

“Using Fluorescence Spectroscopy to Study Free Radical Denaturation and Antioxidant Protection of Phycocyanin,” C. Barta, A. Vaverka, Y Gindt, S. Darveau at the 223rd National Meeting of the American Chemical Society, Orlando, Florida, April, 2002.

Measurement of Sulfate Ion Concentration in Natural Waters: A Novel General Chemistry Laboratory,” A. Fitch, Y. Gindt, and S. Darveau, at the 36th Midwest Regional Meeting of the American Chemical Society, Lincoln, Nebraska, October, 2001.

 “Quantification of Antioxidants in Fruit Juices using Fluorescence Spectroscopy: A General Chemistry Laboratory,” A. Vaverka, Y Gindt, S. Darveau. at the 36th Midwest Regional Meeting of the American Chemical Society, Lincoln, Nebraska, October, 2001.

 “Measurement of Sulfate Ion Concentration in Natural Waters: A Novel General Chemistry Laboratory,” A. Fitch, Y. Gindt, and S. Darveau, at the 110th Meeting of the Nebraska Academy of Sciences, Lincoln, Nebraska, 2000.

Darveau Research Group-Recent and Ongoing Projects

Characterization of Novel Thin Films for Use in Solar Cells:
In collaboration with Christopher Exstrom from UNK, Natale Ianno and Rodney Soukup from the Electrical Engineering department at UNL, we are studying the optical characteristics of amorphous thin films of Silicon, silicon-germanium alloys, germanium-carbide alloys, and now we are working on some very novel materials related to Copper Indium Selenide films.  We hope to create high-efficiency materials for solar energy conversion.

We have added the capability of high-resolution surface Raman microscopy to the research project. This technique will allow us to understand both the composition and behavior of the materials we create. In addition, we are able to create nanoparticulate precursors (see Dr. Exstrom's Research) that can be annealed to create thin films.

Laser Spectroscopy/ Instrument Development
With the support of the University of Nebraska Foundation, we have an ongoing project that is integrating the use of lasers and laser spectroscopy in the chemistry curriculum.  We have developed several laboratories for general chemistry that use a novel modular laser setup for the measurement of sulfate ion concentration in natural waters using laser nephelometry, the determination of rate order and rate constants for the acid-catalyzed hydrolysis of sucrose, and the determination of denaturation kinetics of proteins by free-radicals. 

We have also constructed two advanced instruments: a spectrofluorimeter with CCD detection that uses either broadband or laser excitation sources and a time-resolved laser spectrofluorimeter, also capable of transient absorption measurements.  Recent work with these instruments has included the investigation of porphyrin and metal-porphyrin fluorescence kinetics.

Investigation of Exciton Strings in Stacked Donor:Acceptor Bimolecular Charge-Transfer Complexes
The intent of this project (supported by the UNK RSC) is to investigate a new phenomenon, development of exciton strings, in chage-transfer (CT) crystals.  Excitons, bound electron-hole pairs occur after charge exchange between the electron donor and electron acceptor of a CT complex.  Formation of an exciton string, several excitons arrange "back-to-back" is a phenomenon not seen in other material.  Developing an understanding of exciton strings, their intrinsic stability, and methods of manipulation may lead to new materials capable of acting as a molecular switch.  Such a switch could be made to act in a manner akin to semiconductors, but at a faster rate.

Exciton strings may also act as a perturbing force in crystalline lattices.  A study of such forces lends understanding to the phenomena of solid-sate chemical reactions and detonation of energetic materials.  At this time this project is involved mostly with single crystal growth of model systems and specular reflection spectroscopy on the surfaces of the crystals.

“A New Wide Bandgap Semiconductor Material for High Efficiency Solar Cells.”

Rodney Soukup and Natale J. lanno, University of Nebraska-Lincoln; Chris Exstrom and Scott Darveau, University of Nebraska at Kearney.  Funded by Nebraska Research Initiative. $299,790.  Date Funded:  June 2006

A multicampus project to investigate novel materials for solar cell construction, specifically copper indium selenide films with sustitutional elements aluminum and boron .  Techniques include ellipsometry, ATR-FTIR, specular reflectance, surface enhanced Raman, chemical bath deposition, and chemical vapor deposition.

“Development of CIBS Solar Cells,”

Chris Exstrom and Scott Darveau, University of Nebraska at Kearney; Rodney Soukup and Natale J. lanno, University of Nebraska-Lincoln Funded by DOE, $770,000 (Federal Earmark), Date Funded: May 2006

A multicampus project to investigate novel materials for solar cell construction including copper indium selenide films with sustitutional elements aluminum and boron. Techniques include ellipsometry, ATR-FTIR, specular reflectance, surface enhanced Raman, chemical bath deposition, and chemical vapor deposition.

“A Multicampus Renewable Energy Laboratory of Excellence: Cost Effective Solar Cells.”

Chris Exstrom and Scott Darveau, University of Nebraska at Kearney; Rodney Soukup and Natale J. lanno, University of Nebraska-Lincoln.  Funded by Nebraska Research Initiative. $303,255.00. Date Funded:  June 2002

A multicampus project to investigate novel materials for solar cell construction including amorphous silicon, germanium and silicon-germanium films.  The UNK portion of the grant establishes a spectroscopy center for characterizing thin semiconducting films. Techniques include ellipsometry, ATR-FTIR, specular reflectance, and surface enhanced Raman.  The grant supports 10 hrs/week during the academic year and 40 hours/week during the summer for undergraduate research.

“Stage Two- Investigation of exciton strings in stacked donor-acceptor charge-transfer crystals”

Scott Darveau, University of Nebraska at Kearney funded by Research Services Council at UNK. $7,628 (plus $2000 match from Chemistry Department) Date Funded: May 2001

The grant provides equipment funds to adapt the CCD Raman/fluorescence apparatus in the Chemistry Department for use as a specular reflection spectrometer for the study of charge transfer behavior in solid state crystals. The grant also provides for over 500 hours of undergraduate student research wages. 

“Introduction of Lasers into the Chemistry Curriculum of UNK”

Yvonne Gindt and Scott Darveau. Funded by University of Nebraska Foundation, $75,000. Date Funded: July 1999

The grant provided funds to implement laser Polarimetry experiments in general chemistry. It also funded the construction of a CCD Raman/fluorescence apparatus and a fluorescence decay / transient absorption apparatus for use in upper level physical chemistry and instrumental analysis courses. The advanced instrumentation will also be used extensively in undergraduate research.

“Physical Chemistry and Instrumental Analysis Lab Improvements”

Yvonne Gindt and Scott Darveau. Funded by SVCAA at UNK. $14,183 Date Funded: November 6, 1998

The goal of the project was to address fundamental deficiencies inthe Physical Chemistry and Instrumental Analysis laboratories. Obtained under the grant was an argon ion laser to enhance Raman capabilities and laser experimentation. The laser is complemented with necessary optics, eye protection, and power meters. The Instrumental Analysis lab was improved by the purchase of electronics breadboards for circuit building and analysis and function generators to provide signals for those circuits. Before the grant no breadboards were available and the previous function generator was unreliable and often failed mid-experiment.

“Investigation of exciton strings in stacked donor-acceptor charge-transfer crystals”

Scott A. Darveau, University of Nebraska at Kearney, funded by Research Services Council at UNK. $1966.25

“A New Wide Bandgap Semiconductor Material for High Efficiency Solar Cells.”

Rodney Soukup and Natale J. lanno, University of Nebraska-Lincoln; Chris Exstrom and Scott Darveau, University of Nebraska at Kearney.  Funded by Nebraska Research Initiative. $299,790. Date Funded:  June 2006

A multicampus project to investigate novel materials for solar cell construction, specifically copper indium selenide films with sustitutional elements aluminum and boron .  Techniques include ellipsometry, ATR-FTIR, specular reflectance, surface enhanced Raman, chemical bath deposition, and chemical vapor deposition.

“Development of CIBS Solar Cells,”

Chris Exstrom and Scott Darveau, University of Nebraska at Kearney; Rodney Soukup and Natale J. lanno, University of Nebraska-Lincoln Funded by DOE, $770,000 (Federal Earmark), Date Funded: May 2006

 A multicampus project to investigate novel materials for solar cell construction including copper indium selenide films with sustitutional elements aluminum and boron. Techniques include ellipsometry, ATR-FTIR, specular reflectance, surface enhanced Raman, chemical bath deposition, and chemical vapor deposition.

 “A Multicampus Renewable Energy Laboratory of Excellence: Cost Effective Solar Cells.”

Chris Exstrom and Scott Darveau, University of Nebraska at Kearney; Rodney Soukup and Natale J. lanno, University of Nebraska-Lincoln.  Funded by Nebraska Research Initiative. $303,255.00.  Date Funded:  June 2002

A multicampus project to investigate novel materials for solar cell construction including amorphous silicon, germanium and silicon-germanium films.  The UNK portion of the grant establishes a spectroscopy center for characterizing thin semiconducting films. Techniques include ellipsometry, ATR-FTIR, specular reflectance, and surface enhanced Raman.  The grant supports 10 hrs/week during the academic year and 40 hours/week during the summer for undergraduate research.

“Stage Two- Investigation of exciton strings in stacked donor-acceptor charge-transfer crystals”

Scott Darveau, University of Nebraska at Kearney funded by Research Services Council at UNK. $7,628 (plus $2000 match from Chemistry Department)   Date Funded: May 2001

The grant provides equipment funds to adapt the CCD Raman/fluorescence apparatus in the Chemistry Department for use as a specular reflection spectrometer for the study of charge transfer behavior in solid state crystals. The grant also provides for over 500 hours of undergraduate student research wages. 

“Introduction of Lasers into the Chemistry Curriculum of UNK”

Yvonne Gindt and Scott Darveau. Funded by University of Nebraska Foundation, $75,000.   Date Funded: July 1999

The grant provided funds to implement laser Polarimetry experiments in general chemistry. It also funded the construction of a CCD Raman/fluorescence apparatus and a fluorescence decay / transient absorption apparatus for use in upper level physical chemistry and instrumental analysis courses. The advanced instrumentation will also be used extensively in undergraduate research.

"Physical Chemistry and Instrumental Analysis Lab Improvements”

Yvonne Gindt and Scott Darveau. Funded by SVCAA at UNK. $14,183   Date Funded: November 6, 1998

The goal of the project was to address fundamental deficiencies inthe Physical Chemistry and Instrumental Analysis laboratories. Obtained under the grant was an argon ion laser to enhance Raman capabilities and laser experimentation. The laser is complemented with necessary optics, eye protection, and power meters. The Instrumental Analysis lab was improved by the purchase of electronics breadboards for circuit building and analysis and function generators to provide signals for those circuits. Before the grant no breadboards were available and the previous function generator was unreliable and often failed mid-experiment.

“Investigation of exciton strings in stacked donor-acceptor charge-transfer crystals”

Scott A. Darveau, University of Nebraska at Kearney, funded by Research Services Council at UNK. $1966.25   Date Funded: October 10, 1997

The grant provided funds to purchase the necessary chemicals and labware to initiate an investigation into solid-state charge-transfer complexes and their physical properties.