diamond-carbon-graphene-2017-scientifictracks-abstracts

Page 64

Notes:

conferenceseries

.com

Joint Conference

July 17-18, 2017 Chicago, USA

International Conference on

DIAMOND AND CARBON MATERIALS & GRAPHENE AND SEMICONDUCTORS

Volume 6, Issue 6 (Suppl)

J Material Sci Eng, an open access journal

ISSN: 2169-0022

Diamond and Carbon 2017 & Graphene 2017

July 17-18, 2017

Manipulation of electrical properties in CVD-grown twisted bilayer graphene induced by

dissociative hydrogen adsorption

Yung Woo Park

and

S J Hong

Seoul National University, South Korea

he effect of hydrogen adsorption on twisted bilayer graphene (tBLG) was studied. Raman spectroscopy and the electrical

transport properties (electrical resistance and thermoelectric power) confirm that the electron doping by hydrogen

adsorption, in agreement with the previous report involving exfoliated bilayer graphene (BLG). Common electron doping

behavior were observed at various twist angles (0o, 5o, 12.5o and 30o), and the adsorptions follow the first–order Langmuir-

type adsorption model. Specifically, we analyzed the off-state currents, with band-gap openings of around 13 meV in tBLG

with twist angle of 0o, as in Bernal-stacked BLG.

Biography

Yung Woo Park graduated summa cum laude in 1975 from the Physics Department of Seoul National University in South Korea. He received his PhD from University

of Pennsylvania, Philadelphia, United States in 1980. His PhD thesis on the "Electrical Transport Studies of Pure and Doped Polyacetylene" was supervised by

Professor Alan J Heeger. He was involved in the original discovery of conducting polymers in 1977 under the guidance of Prof. Alan J Heeger. He has made

unique contributions on the synthesis and transport studies of carbon based nanostructures such as conducting polymer nanofibers, carbon nanotube, organic

conductors, molecular conductors and graphene. He has also contributed significantly to the transport and mechanism studies of highly correlated materials, such

as high Tc superconductors. In particular, his recent discovery of "Zero magneto resistance in polymer nanofibers" is his most important and seminal achievement.

In particular, the CNT based nonvolatile MEMS memory has achieved a 1000 times faster switching speed, applicable to the MP3s, smart phones and cameras

with very low power consumption and possible multinary bit devices.

ywpark@snu.ac.kr

Yung Woo Park et al., J Material Sci Eng 2017, 6:6(Suppl)

DOI: 10.4172/2169-0022-C1-076