title: Enhanced response and sensitivity of self-corrugated graphene sensors with anisotropic charge distribution.
abstract: We introduce a high-performance molecular sensor using self-corrugated chemically modified graphene as a three dimensional (3D) structure that indicates anisotropic charge distribution. This is capable of room-temperature operation, and, in particular, exhibiting high sensitivity and reversible fast response with equilibrium region. The morphology consists of periodic, "cratered" arrays that can be formed by condensation and evaporation of graphene oxide (GO) solution on interdigitated electrodes. Subsequent hydrazine reduction, the corrugated edge area of the graphene layers have a high electric potential compared with flat graphene films. This local accumulation of electrons interacts with a large number of gas molecules. The sensitivity of 3D-graphene sensors significantly increases in the atmosphere of NO2 gas. The intriguing structures have several advantages for straightforward fabrication on patterned substrates, high-performance graphene sensors without post-annealing process.
authors.affiliation: 1] Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea [2] Department of Electrical Functionality Material Engineering, University of Science and Technology (UST), Daejon 305-333, Republic of Korea.
authors.forename: Seung Yol
authors.initials: SY
authors.lastname: Jeong
authors.affiliation: Multidimensional Nanomaterials Research Group, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea.
authors.forename: Sooyeon
authors.initials: S
authors.lastname: Jeong
authors.affiliation: Perform Modeling Research Division, Korea Institute of Carbon Convergence Technology, Jeonju 561-844, Republic of Korea.
authors.forename: Sang Won
authors.initials: SW
authors.lastname: Lee
authors.affiliation: Center for Nanostructure Physics (CINAP), Institute for Basic Science (IBS), WCU Department for Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
authors.forename: Sung Tae
authors.initials: ST
authors.lastname: Kim
authors.affiliation: Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea.
authors.forename: Daeho
authors.initials: D
authors.lastname: Kim
authors.affiliation: Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea.
authors.forename: Hee Jin
authors.initials: HJ
authors.lastname: Jeong
authors.affiliation: 1] Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea [2] Department of Electrical Functionality Material Engineering, University of Science and Technology (UST), Daejon 305-333, Republic of Korea.
authors.forename: Joong Tark
authors.initials: JT
authors.lastname: Han
authors.affiliation: Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea.
authors.forename: Kang-Jun
authors.initials: KJ
authors.lastname: Baeg
authors.affiliation: 1] Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea [2] Department of Chemistry &Chemical Engineering, Inha University, Incheon 402-751, Republic of Korea.
authors.forename: Sunhye
authors.initials: S
authors.lastname: Yang
authors.affiliation: Center for Nanostructure Physics (CINAP), Institute for Basic Science (IBS), WCU Department for Energy Science, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
authors.forename: Mun Seok
authors.initials: MS
authors.lastname: Jeong
authors.affiliation: Multidimensional Nanomaterials Research Group, Korea Electrotechnology Research Institute (KERI), Changwon 642-120, Republic of Korea.
authors.forename: Geon-Woong
authors.initials: GW
authors.lastname: Lee