First-principles study for a MXene terahertz detector

Title
First-principles study for a MXene terahertz detector
Authors
전영민서민아전영인
Keywords
MXene; first-principles study; terahertz; detector; 연구자요청으로 2017-11 반영완료된 데이터
Issue Date
2018-01
Publisher
Nanoscale
Citation
VOL 10-75
Abstract
2D transition metal carbides, nitrides, and carbonitides called MXenes have attracted increasing attention due to their outstanding properties in many fields. By performing systematic density functional theory calculations, here we show that MXenes can serve as excellent terahertz detecting materials. Giant optical absorptions and extinction coefficients are observed at the terahertz range in the most popular MXene, namely, Ti3C2, which is regardless of stacking degree. Various other optical properties are investigated as well at the terahertz range for in-depth understanding of its optical response. We find that the thermoelectric figure of merit (ZT) of stacked Ti3C2 flakes is comparable to that in carbon nanotube films. Based on excellent terahertz absorption and decent thermoelectric efficiency in MXenes, we finally suggest the promise of MXenes in terahertz detection applications, which includes terahertz bolometers and photothermoelectric detectors. Possible ZT improvements are discussed in largescale MXene flake films and/or MXene-polymer composite films.
URI
http://pubs.kist.re.kr/handle/201004/67001
ISSN
2040-3364
Appears in Collections:
KIST Publication > Article
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