Research
Interests:
"Life
at the edge"-Surfaces are where the action is.
Our research program is aimed at characterizing and
understanding chemical reactions at surfaces. Interfacial processes
and surface chemistry are at the heart of technologies associated
with the chemical and petroleum industries, production of microelectronic
devices, and design and fabrication of sensors and diagnostic devices,
and play key roles in heterogeneous processes in environmental and
atmospheric chemistry. By discovering novel methods to alter and
control surface chemistry we seek to develop new catalysts for specialty
chemical synthesis, make advanced materials with novel properties,
and build functional nanostructures from a "bottom-up" approach
utilizing directed manipulation and layered nanofabrication at surfaces
and interfaces. Surfaces are central to nanoscience and technology,
modifying and controlling important properties of nanoparticles
and electrical contacts. We employ a wide array of surface
analytical techniques in our work, including scanning tunneling
microscopy (STM), high resolution X-ray photoelectron spectroscopy
(XPS), and infrared reflection-absorption spectroscopy (IRAS).
Current research projects include: (i) Structure, Reactivity, and
Catalysis of Pt-Alloy Surfaces, (ii) Investigations of Bond-Selective
Chemistry using Low Energy Electrons and Ions, (iii) Chemistry at
Au Surfaces, (iv) Ozone Oxidation of Hydrocarbons in Condensed Films,
and (v) Robotic Assembly of Functional Nanostructures.
Group
Homepage
Scienta ESCA 300 facility
Teaching
Interests:
I particularly
enjoy teaching in the General (Freshman) Chemistry program. I try
to show that applications are everywhere and to communicate the
excitement of recent scientific advances, e.g. , observation,
manipulation, and control of reactivity at the atomic scale. At
the graduate level, I have primarily taught a course in Surface
Chemistry. Depending on student interest, this course has emphasized
more or less the various aspects of the field, such as kinetics,
bonding and mechanistic chemistry or surface analysis.
Recent
Publications:
2005
212.
"Demonstration of an In-situ Electrochemical RBS System to
Study Electrode-Electrolyte Interfaces",
A. Hightower, B.E.
Koel, and
T. Felter, in Electrode Processes VII (from the
206th Meeting of The
Electrochemical Society, Honolulu,
HI, Oct. 3-8, 2004,
ECS Proceedings, Vol. 2004-18) ,
V.I. Birss, D.
Evans, M. Josowicz,
and M. Osawa (Eds.),
(ECS,Pendington, NJ,
2005), p. 46-54.
211.
"Fabrication of Polystyrene Latex nanostructures by
Nanomanipulation and
Thermal Processing," E. Harel, S.E.
Meltzer, A.A.G. Requicha,
M.E. Thompson, and B.E. Koel,
Nano Lett.,
5, 2624-2629 (2005).
210.
"TPD and FT-IRAS investigation of ethylene oxide (EtO)
adsorption on a Au(211) stepped
surface", J. Kim and B.E.
Koel, Langmuir,
21, 3886-3891 (2005).
209.
"Hydrogenation of 1,3-butadiene on two ordered Sn/Pt(111)
surface alloys",
H. Zhao and B.E. Koel, J. Catal., 234,
24-32
(2005).
208.
"Reactivity of Ethyl Groups on a Sn/Pt(111) Surface Alloy",
H. Zhao
and B.E. Koel, Catal. Lett., 99, 27-32
(2005).
207.
"Influence of coadsorbed hydrogen on ethylene adsorption and
reaction a ( 3x 3)R30°-Sn/Pt(111)
surface alloy", H. Zhao, and
B.E. Koel, Langmuir,
21(3), 971-975 (2005).
2004
206. "Adsorption
and reaction of bicyclic hydrocarbons at PT(111)
and Sn/Pt(111) surface alloys: trans-decahydronaphthalene
(C10H18)
and bicyclohexane (C12H22)",
H. Zhao and
B. E. Koel, Surface Sci.,
573, 413-425 (2004).
205. "Adsorption and
reaction of 1,3-butadiene on Pt(111) and
Sn/Pt(111) surface alloys", H. Zhao and B.E. Koel,
Surface
Sci., 572, 261-268 (2004).
204. "Fundamental
studies of titanium oxide-Pt(100) interfaces-II.
Influence of oxidation and reduction reactions
on the surface
structure of TiOx
films on Pt(100)", T. Matsumoto, M. Batzill,
S. Hsieh,
and B.E. Koel, Surface Sci, 572, 146-161
(2004).
203. "Fundamental
studies of titanium oxide-Pt(100) interfaces - I.
Stable high temperature structures formed by annealing
TiOx
films on Pt(100)", T. Matsumoto, M. Batzill, S.
Hsieh, and
B.E. Koel, Surface Sci., 572,
127-145 (2004).
202. "Nanofiltration
of natural organic matter with H2O2/UV
pretreatment: fouling mitigation and membrane surface
characterization", W. Song, V. Ravindran, B.E.
Koel, and M.
Pirbazari, J. Membrane Sci., 241,
143-160 (2004).
201. "Adsorption and reaction
of NO2 on a ( 3x 3))R30°
Sn/Pt(111) surface alloy", M.R. Voss, H. Zhao,
and
B.E. Koel, Surface Sci., 560,
235-245 (2004).
200. "Epitaxial growth of tin-oxide
on Pt(111): Structure and
properties of wetting layers and SnO2-crystallites",
M. Batzill,
J. Kim, D.E. Beck, and B.E. Koel Phys. Rev. B,
69,
165403-11 (2004).
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