Department of Chemical and Biomolecular Engineering
Korea Advanced Institute of Science and Technology

Recent Achievements

제목

[Front cover picture] Metallic Ti3C2Tx MXene Gas Sensors with Ultrahigh Signal-to-Noise Ratio

Title: Metallic Ti3C2Tx MXene Gas Sensors with Ultrahigh Signal-to-Noise Ratio

Author: Seon Joon Kim, Hyeong-Jun Koh, Chang E. Ren, Ohmin Kwon, Kathleen Maleski, Soo-Yeon Cho, Babak Anasori, Choong-Ki Kim, Yang-Kyu Choi, Jihan Kim, Yury Gogotsi*, Hee-Tae Jung*


Journal: ACS Nano 2018, 12 (2), 986-993.


Abstract: Achieving high sensitivity in solid-state gas sensors can allow the precise detection of chemical agents. In particular, detection of volatile organic compounds (VOCs) at the parts per billion (ppb) level is critical for the early diagnosis of diseases. To obtain high sensitivity, two requirements need to be simultaneously satisfied: (i) low electrical noise and (ii) strong signal, which existing sensor materials cannot meet. Here, we demonstrate that 2D metal carbide MXenes, which possess high metallic conductivity for low noise and a fully functionalized surface for a strong signal, greatly outperform the sensitivity of conventional semiconductor channel materials. Ti3C2Tx MXene gas sensors exhibited a very low limit of detection of 50100 ppb for VOC gases at room temperature. Also, the extremely low noise led to a signal-to-noise ratio 2 orders of magnitude higher than that of other 2D materials, surpassing the best sensors known. Our results provide insight in utilizing highly functionalized metallic sensing channels for developing highly sensitive sensors. 

 

 

 

0

추천하기

0

반대하기

첨부파일 다운로드

등록자관리자

등록일2018-03-06

조회수1,646

  • 페이스북 공유
  • 트위터 공유
  • Google+ 공유
  • 인쇄하기
 
스팸방지코드 :
사진제목
Seungwoo Lee, Hong Suk Kang, Jung-Ki Park*Highlighted as a “Frontispiece” of Advanced Functional Materials, 21(10), 1770-1778 (2011) Article first published online: 15 MAR 2011 DOI: 10.1002/adfm.201001927 http://onlinelibrary.wiley.com/doi/10.1002/adfm.201001927/abstract Abstract A major challenge in nanolithography is to overcome the resolution limit of conventional patterni...
Shin-Hyun Kim, Hyerim Hwang, Che Ho Lim, Jae Won Shim, Seung-Man Yang Article first published online: 1 MAR 2011 DOI: 10.1002/adfm.201002316 http://onlinelibrary.wiley.com/doi/10.1002/adfm.201002316/abstract Abstract Advances in microfluidic emulsification have enabled the creation of multiphase emulsion drops, which have emerged as promising templates for producing functional micro...
Byoung Yeon Won, Sujeong Shin, Songyi Baek, Ye Lim Jung, Taihua Li, Sung Chul Shin, Dae-Yeon Cho, Sang Bok Lee and Hyun Gyu ParkAnalyst, 2011, 136, 1573-1579DOI: 10.1039/C0AN00695E Received 07 Sep 2010, Accepted 21 Jan 2011First published on the web 14 Feb 2011http://pubs.rsc.org/en/Content/ArticleLanding/2011/AN/c0an00695e Abstract The operation of an electrochemical real-time PCR syste...
Min-Ah Woo†, Moon Il Kim†, Byung Jo Yu‡, Daeyeon Cho§, Nag-Jong Kim†, June Hyoung Cho‡, Byung-Ok Choi*, Ho Nam Chang†, and Hyun Gyu Park*† † Department of Chemical and Biomolecular Engineering (BK21 Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea‡ MD Science Inc., 258-1 Munji-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea http://pubs...
Ki Soo Park, Cheulhee Jung and Hyun Gyu Park Angewandte Chemie International Edition, 49(50), 9757-9760, (2010.12.10) Article first published online: 26 OCT 2010 DOI: 10.1002/anie.201004406 http://onlinelibrary.wiley.com/doi/10.1002/anie.201004406/abstract Abstract Metal ion, an astonishing illusionist: In a new concept, “illusionary” polymerase activity is intentionally...