Dr. Mikhail Zamkov's
research focuses on the electronic, chemical and optical properties of hybrid
nanoscale materials prepared with sub-nanometer precision by means of colloidal
syntheses. Such semiconductor or metal nanoparticles can be chemically
manipulated like large molecules and can be coupled to each other or can be
incorporated into different types of inorganic or organic matrices. The ease of
manipulating both the dimensions of the individual particles as well as their
arrangement in a complex interacting structure makes colloidal nanostructures
well-suited for studies of size/structure-dependent quantum-mechanical
interactions and as ideal building blocks for nanoscale engineering.
Specifically, experimental work in Dr. Zamkov's group addresses four major
areas: (1) synthesis and characterization of novel nanoscale building blocks,
(2) elucidation of their fundamental optoelectronic properties, (3) design and
demonstration of functional nanoscale devices and integrated nanosystems, and
(4) exploration of the interface/communication between biological systems and
nanoscale devices. This research by is highly interdisciplinary, involving
concepts and techniques from biology, chemistry, physics and the engineering
sciences to achieve their goals.
Dr. Liangfeng Sun's
research group fosters interdisciplinary research including diverse
topics of physics, chemistry and engineering of nanostructured materials. The
goal of his research team is to discover and investigate the novel physical and
chemical properties of the materials in the nanometer scale, and apply them in
photochemistry, bio-imaging, light-emitting devices and solar cells.
Dr. Sun's publications include one paper in Nature Nanotechnology,
one paper in Physical Review Letters, and six papers in
Nano Letters. His PbSe-nanocrystal-based solar cells rank among the
highest performing nanocrystal-based solar cells reported to date. His
record-brightness PbS-nanocrystal-based light-emitting diodes emit infrared
light with tunable wavelength from 800 nm to 1800 nm, which will find broad
application in free space and fiber optical communication, night vision and
SEM images of the colloidal PbS nanocrystals synthesized in our lab
recently. The monodispersed nanocrystals show size of about 6nm in diameter.
The students in Dr. Sun's group learn and master many experimental techniques
for nanomaterial research, including electron microscopy (such as TEM and SEM),
UV-Vis-IR spectroscopy, laser technology, synthesis of nanostructured materials,
optoelectronic device fabrication and testing. Moreover, they participate in
planning future research and building up the lab, where they gain
significant critical-thinking and problem-solving skills. These will be their
assets when they pursue their future career either in academics or in industry.