Duan Research Group

Hetero-integrated Nanostructures and Nanodevices

Welcome to the Duan Lab webpage!

News:

  • Tiny defects in semiconductors created ‘speed bumps’ for electrons. UCLA researchers cleared the path
    Jun 10, 2018

    UCLA scientists and engineers have developed a new process for assembling semiconductor devices. The advance could lead to much more energy-efficient transistors for electronics and computer chips, diodes for solar cells and light-emitting diodes, and other semiconductor-based devices.

    From newsroom.ucla.edu

  • UCLA researchers develop a new class of two-dimensional materials
    May 1, 2018

    A research team led by UCLA scientists and engineers has developed a method to make new kinds of artificial “superlattices” — materials comprised of alternating layers of ultra-thin “two-dimensional” sheets, which are only one or a few atoms thick. Unlike current state-of-the art superlattices, in which alternating layers have similar atomic structures, and thus similar electronic properties, these alternating layers can have radically different structures, properties and functions, something not previously available.

    From http://newsroom.ucla.edu

  • 2D semiconductors could make negative conductance devices
    Aug 28, 2017

    Researchers in the US and Saudi Arabia are the first to have observed negative transconductance (NTC) inside multilayer molybdenum-disulphide (MoS2) transistors with optimized graphene/metal hybrid contacts. The NTC behaviour comes about thanks to competition between inter-layer charge transport and charge transport through a vertical potential barrier in the MoS2. This unique effect could be exploited for making frequency doublers and phase-shift keying circuits with only one multilayer transistor – something that would greatly simplify circuit design compared to conventional technology, says the team.

    From nanotechweb.org

  • Catalytic Duo Combats Blood Clots
    Feb 17, 2014

    A pair of natural catalysts attached to graphene work in tandem to make nitroxyl, which could prevent blood clots from forming on medical implants [via acs.org]

  • New graphene 'nanomesh' could change the future of electronics
    Feb 25, 2010

    A new graphene nanostructure called graphene nanomesm (GNM) is able to open up a band gap in a large sheet of graphene to create a highly uniform, continuous semiconducting thin film that may be processed using standard planar semiconductor processing methods. [via newsroom.ucla]

Selected Publications:

UCLA, Department of Chemistry and Biochemistry
607 Charles E. Young Drive East, Box 951569
Los Angeles, CA 90095-1569
E-mail: xduan@chem.ucla.edu