Yu Lin (SIMES Seminar)

Date(s) - Sep 2 2015
11:15 AM - 12:15 PM

Sierra Room, Bldg 40, Room R125


The Revealing Role of Pressure in Materials and Energy Sciences

Dr. Yu Lin
Geological & Environmental Sciences, Stanford University

Pressure dramatically alters a material’s physical and chemical properties over varying energy scales, adding a new dimension to energy-related, electronic, optical, mechanical, biological, and environmental applications. I will focus on three of my projects where pressure enables improved understanding of the origins of unusual phenomena and novel materials synthesis. (1) I will describe the first instance of pressure-induced room-temperature electrical conductivity arising in a two-dimensional Cu(II)-Cl organic-inorganic hybrid perovskite. (2) I will discuss the formation of a new carbon allotrope – amorphous diamond – through cold compression of glassy carbon. (3) I will present the synthesis and recovery of sub-10 nm graphene nanoribbons through subjecting carbon nanotubes to high pressure and moderate temperature. I will also discuss future opportunities for pushing the frontier of extreme conditions research by exploiting the concept of a “chemically pre-compressed state” and synthesizing novel structures through manipulating a material’s metastability.