学术论坛通知：本期学术论坛由Lawrence Berkeley National Lab的Dr. Lin Yang主讲

题目：Phonon Transport in Nanowires – Beyond Classical Size Effects

报告人：Dr. Lin Yang

时间：1月14日中午10:00-11:00

地点：机械楼424

报告摘要：

Understanding and controlling thermal transport in one dimensional nanostructures as well as at their interfaces are emerging as an essential necessity for the development of a broad variety of technologies in nanoelectronics and energy conversion. In the past two decades, the thermal conductivities of many different kinds of nanostructures have been explored and the underlying mechanisms governing the transport process have been dissected. For nanowires, beyond the well-recognized classical size effects due to phonon-boundary scattering, several new factors, such as acoustic softening, surface roughness, and complex morphology, have also been shown to be able to significantly alter the thermal conductivity of nanowires.

This talk seeks to further the understanding of the complicated transport dynamics in thin nanostructures and at their interfaces, and to answer some of the fundamental questions on interactions between energy and charge carriers in quasi-one-dimensional systems. These questions are addressed through a number of combined experimental approaches, such as the thermal conductance and thermoelectric property measurements of suspended nanostructures, elastic property test with atomic force microscopy, and high-resolution transmission electron microscopy examination.

报告人简介：

Dr. Lin Yang is currently a Postdoc researcher at Lawrence Berkeley National Lab. He received his B.S. degree from Xi’an Jiaotong University in 2014, and Ph.D. degree from Vanderbilt University in 2019. Dr. Yang’s primary research interest lies in experimental investigation of phonon and electron transport and interactions in low dimensional nanostructures, energy transport and conversion, as well as thermoelectric materials.

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