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Yaqiong Xu

Associate Professor of Electrical Engineering
Associate Professor of Physics


Yaqiong's group focuses on investigating the electron, photon, and phonon coupling in low-dimensional materials and exploring their applications in biological and energy conversion fields. We develop an optoelectronic probing system combining fluorescence spectroscopy, scanning photocurrent microscopy, and optical trapping techniques to study the complex interfaces between nanomaterials and biomolecules at the single-molecule level. We integrate low-dimensional materials based transistors with scanning photocurrent microscopy to investigate the electrical activities of individual synapses and neurons in neuronal networks. We are also interested in synthesizing various low-dimensional materials, investigating their electric/optical/optoelectronic properties, and exploring their possible use in photodetection and photovoltaics.


• SEC Faculty Travel Award, 2014
• CFT’s Junior Faculty Teaching Fellowship, 2012
• NSF CAREER Award, 2011
• Chinese Government Award for Outstanding Self-Finance Students Abroad, 2006

Selected Publications:

Direct Measurement of pi Coupling at the Single-Molecule Level using a Carbon Nanotube Force Sensor. Hong, T; Wang, TJ; Xu, YQ, NANO LETTERS, 18, 7883-7888 , (2018) View Abstract

High-Performance WSe2 Phototransistors with 2D/2D Ohmic Contacts. Wang, TJ; Andrews, K; Bowman, A; Hong, T; Koehler, M; Yan, JQ; Mandrus, D; Zhou, ZX; Xu, YQ, NANO LETTERS, 18, 2766-2771 , (2018) View Abstract

Membrane cholesterol mediates the cellular effects of monolayer graphene substrates. Kitko, KE; Hong, T; Lazarenko, RM; Ying, D; Xu, YQ; Zhang, Q, NATURE COMMUNICATIONS, 9, 796 , (2018) View Abstract

Ultrasensitive Graphene Optoelectronic Probes for Recording Electrical Activities of Individual Synapses. Wang, R; Shi, MJ; Brewer, B; Yang, LJ; Zhang, YC; Webb, DJ; Li, DY; Xu, YQ, NANO LETTERS, 18, 5702-5708 , (2018) View Abstract

Visualizing Light Scattering in Silicon Waveguides with Black Phosphorus Photodetectors. Wang, TJ; Hu, SR; Chamlagain, B; Hong, T; Zhou, ZX; Weiss, SM; Xu, YQ, ADVANCED MATERIALS, 28, 7162-+ , (2016) View Abstract