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| Interfacial
Velocity-Dependent Plasmon Damping in Colloidal Metallic Nanoparticles |
On the cover of
the Journal of Physical Chemistry C, Vol. 111, Apkarian-Corn
groups, in collaboration with Newport Corporation report that “the
interfacial velocity-induced electrophoretic potential leads to plasmon
damping in colloidal nanoparticles”. and
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 In
one of the most-accessed papers published in Nano Letters, Ken Shea
and his
graduate student
Mariya Khiterer report a general method for
the synthesis of uniform functional hybrid nanoparticles. Spherical
bridged polysilsesquioxane nanoparticles are prepared utilizing
microemulsion technology. The electrochemically active charged
nanoparticles are being utilized in solid state electrochromic devices
and as carriers for polyanions such as DNA. Nano Letters, 2007, 7,
2684-2687 [
Link
]
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august, 2007
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Novel Cyclophane Catalyst
for Valuable Materials
A “Holy Grail” in
olefin polymerization
catalysis field is to discover transition metal catalysts that can
efficiently copolymerize polar olefins. In a Communication to J.
Amer. Chem. Soc. that is currently in press, Professor Guan
and his graduate student Chris Popeney, and former postdoctoral fellow
Drexel Camacho, have reported a cyclophane-based Pd(II) complex that is
highly efficient in incorporating polar olefins like acrylates.
Furthermore, low temperature NMR studies have revealed a unique
mechanistic origin for the increased efficiency for polar olefin
incorporation.
[ Link
]
Journal of the American
Chem. Soc. | http://pubs.acs.org/journals/jacsat/index.html
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ISIS (the
Institute of
Surface and Interface Science) is
one of 16 Organized Research
Units (ORUs) on the University of California, Irvine (UCI) campus.
Through collaborative projects it brings together faculty and
researchers in multiple departments.
|
fax: (949) 824-8125
|
may, 2007
|
May 9th, 2007, VOL 2, Nature Nanotechnology "News&Views" - Nanofuidic Diode:
Will Fluidic electronics take off?
With applications ranging from molecular detection to the control of
chemical reactions, synthetic nanochannels and nanopores are the focus
of growing scientific interest. Now, two groups of researchers
have shown that nanochannels filled with an electrolyte behave like the
electrical diodes that regulate the direction of current in power
supplies and surge protectors.
Writing in Nano Letters, Ivan Vlassiouk and Zuzanna Siwy of the University
of California, Irvine, and Arun Majumdar and co-workers at the
University of California, Berkeley, the University of Tokyo and the
Lawrence Berkeley National Laboratory report that when a positive
voltage is applied to a nanofluidic diode, the ion current is several
hundred times larger than with the corresponding negative voltage.
[ Link
]
nature
nanotechnology | VOL 2 | MAY 2007 | www.nature.com/naturenanotechnology
|
................................................................................................................................................................................
ISIS (the
Institute of
Surface and Interface Science) is
one of 16 Organized Research
Units (ORUs) on the University of California, Irvine (UCI) campus.
Through collaborative projects it brings together faculty and
researchers in multiple departments.
|
fax: (949) 824-8125
|
january, 2007
|
What
is the smallest possible circuit that could ever be made?
Researchers at UCI have made a circuit out of a single molecule using a
technique so versatile that the molecule can be almost anything -- a
protein, an antibody or a virus. The new technique, described in
the Jan.
5 issue of Science,
merges biochemistry with nanoscale electronics to control chemical
reactions one bond at a time and detect chemical bonding with
single-molecule precision. The remarkable sensitivity provides a new
research tool for science at the nanoscale -- for studying complex
biomolecules and building novel electronics.
This step forward for nanotechnology required close collaboration among
physics, chemistry and molecular biology. The research team is led by Philip Collins,
assistant professor of physics and astronomy, and Gregory Weiss,
associate professor of chemistry.
|
................................................................................................................................................................................
ISIS (the
Institute of
Surface and Interface Science) is
one of 16 Organized Research
Units (ORUs) on the University of California, Irvine (UCI) campus.
Through collaborative projects it brings together faculty and
researchers in multiple departments.
|
fax: (949) 824-8125
|
..................................................................................................................................................................................
december, 2006
|
In
a
recent communication in JACS, R. B. Gerber
and coworkers L. Sheng and A. Cohen have predicted by electronic
structure calculations the existence of the chemically bonded molecules
H-Ar-C≡ C-C≡ C-H and H-Ar-C≡ C-C≡ C-C≡ C-H. These are the first
predictions of chemically bound compounds made of argon and
hydrocarbons. So far, H-Ar-F is the only experimentally known
covalently bound compound of argon. The predicted H-Ar-C6-H is expected
to be more stable than H-Ar-F. [ Link
]
|
................................................................................................................................................................................
ISIS (the
Institute of
Surface and Interface Science) is
one of 16 Organized Research
Units (ORUs) on the University of California, Irvine (UCI) campus.
Through collaborative projects it brings together faculty and
researchers in multiple departments.
|
fax: (949) 824-8125
|
..................................................................................................................................................................................
november, 2006
|
Professors
Doug Tobias
and Barbara
Finlayson-Pitts
along with AirUCI international collaborator, Professor Pavel Jungwirth
of the Academy of Sciences of the Czech Republic, edited a special
issue of Chemical Reviews on the "Structure and Chemistry of Aqueous
Interfaces." In this issue, Jungwirth and Tobias
review their theoretical development and experimental validation of a
new view of ion solvation at the air-water interface and its
implications for the chemistry of aqueous particles in the atmosphere.
|
................................................................................................................................................................................
ISIS (the
Institute of
Surface and Interface Science) is
one of 16 Organized Research
Units (ORUs) on the University of California, Irvine (UCI) campus.
Through collaborative projects it brings together faculty and
researchers in multiple departments.
|
fax: (949) 824-8125
|
june, 2006
|
Cover
illustration by Robert Corn.
Surface plasmon resonance imaging (SPRI) is an
extremely versatile method for detecting the adsorption of DNA,
RNA, and proteins onto biopolymer microarrays. The array image
shown on the cover arises from the SPRI response to the hybridization
adsorption of a 16 base DNA oligonucleotide onto a 64 element DNA
microarray created on a gold thin film surface. Each array element is
500 by 500 microns; half of the array elements are perfectly
complementary to the 16mer. Our
recent work has focused on achieving greate specificity and sensitivity
from the SPRI measurements by coupling the surface bioaffinity process
to an enzymatic transformation such as ligation or polymerase extension.
|
................................................................................................................................................................................
ISIS (the
Institute of
Surface and Interface Science) is
one of 16 Organized Research
Units (ORUs) on the University of California, Irvine (UCI) campus.
Through collaborative projects it brings together faculty and
researchers in multiple departments.
|
fax: (949) 824-8125
|
|
