One-dimensional (1D) nanostructures are of both fundamental and technological interest. They not only exhibit interesting electronic and optical properties intrinsically associated with their low dimensionality and the quantum confinement effect, but also represent the critical components in the potential nanoscale device applications. With the ever-decreasing sizes of these 1D nanostructures, the "bottom-up" chemical approach is playing increasing role due to its capability of making much smaller features as compared to the "top-down" approach. Major challenge, however, remains in order to fully exploit the 1D nanostructures, namely, the development of suitable chemical strategies for the rational synthesis, organization and integration of these nanoscale building blocks.
The Yang research group is interested in the synthesis of new classes of materials and nanostructures with an emphasis on developing new synthetic approaches and understanding the fundamental issues of structural assembly and growth that will enable the rational control of material composition, micro/nano- structure, property and functionality. We are putting together a nanoscale toolbox where nanowires of different compositions and properties (metal, semiconductor) will be used as building blocks in our continuing efforts in miniaturizing optoelectronic devices. For example, semiconductor (Si, Ge, ZnO, GaN) nanowires are being synthesized using chemical vapor deposition/transport. Significant effort has also been placed on investigating the novel physical properties of the nanowire building blocks. Particularly we are interested in the thermoelectrical, photovoltaic and optoelectronic properties. Due to their high surface area, low-dimensionality and potential quantum confinement, many new physical properties are expected. These novel properties serve as the basis for miniaturized devices such as laser, photovoltaics, thermoelectrics and solar-to-fuel conversion systems.
In the News
New Director Assumes Helm of Kavli ENSI: Peidong Yang to direct the Kavli Energy NanoScience Institute
Berkeley Lab and UC Berkeley scientists adapt next-gen solar cell materials for a different purpose.
Peidong Yang, a UC Berkeley chemist who is trying to capture carbon dioxide from the air and turn it into a sustainable transportation fuel, has been named a MacArthur “genius” Fellow.
A potentially game-changing breakthrough in artificial photosynthesis has been achieved with the development of a system that can capture carbon dioxide emissions before they are vented into the atmosphere and then, powered by solar energy, convert that carbon dioxide into valuable chemical products.
A big step in the development of next-generation fuel cells and water-alkali electrolyzers has been achieved with the discovery of a new class of bimetallic nanocatalysts that are an order of magnitude higher in activity than the target set by the DOE.
The Kavli Foundation has endowed a new institute at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory (Berkeley Lab) to explore the basic science of how to capture and channel energy on the molecular or nanoscale and use this information to discover new ways of generating energy for human use.
Four Lawrence Berkeley National Laboratory (Berkeley Lab) scientists have been elected to the 2012 class of the American Academy of Arts and Sciences, an honorary society founded in 1780 to recognize leading “thinkers and doers.”
A Single Cell Endoscope: Berkeley Researchers Use Nanophotonics for Optical Look Inside Living Cells
Berkeley researchers have developed a nanowire endoscope that can provide high-resolution optical images of the interior of a single living cell, or precisely deliver genes, proteins, therapeutic drugs or other cargo without injuring or damaging the cell.
California Team to Receive up to $122 Million for Energy Innovation Hub to Develop Method to Produce Fuels from Sunlight
U.S. Deputy Secretary of Energy Daniel Poneman announced a new award of up to $122 million to establish an Energy Innovation Hub aimed at developing revolutionary methods to generate fuels directly from sunlight.