Chemical Sensors Based on Randomly Stacked Graphene Flakes

Amin Salehi-Khojin; David Estrada; Kevin Y. Lin; Ke Ran; Richard T. Haasch; Jian-Min Zuo; Eric Pop; Richard I. Masel

doi:10.1063/1.3676276

Chemical Sensors Based on Randomly Stacked Graphene Flakes

Amin Salehi-Khojin, David Estrada, Kevin Y. Lin, Ke Ran, Richard T. Haasch, Jian-Min Zuo, Eric Pop, Richard I. Masel

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

We demonstrate a simple fabrication method to produce randomly stacked graphene chemiresistors using surfactant-assisted exfoliation of graphite. We analyze the sensitivity of such chemiresistors as a function of vacuum filtration volume and temperature. At low vacuum filtration volumes (<∼5 mL) the sensors exhibit superior sensitivity towards target molecules compared to previously developed polycrystalline graphene, polycrystalline graphene microribbon, and carbon nanotube chemical sensors. Temperature dependent measurements, transmission electron microscopy and scanning electron microscopy suggest the improved sensitivity in the randomly stacked graphene chemiresistors is due to 2-dimensional charge carrier hopping through edge defects.

Original language	American English
Journal	Applied Physics Letters
Volume	100
Issue number	3
DOIs	https://doi.org/10.1063/1.3676276
State	Published - 16 Jan 2012
Externally published	Yes

Keywords

carbon nanotubes
chemical sensors
filtration
graphene
graphite
resistors
scanning electron microscopy
transmission electron microscopy

EGS Disciplines

Engineering
Materials Science and Engineering

Access to Document

10.1063/1.3676276

Cite this

@article{3020acc4b6ae4437831e820cebf3a175,

title = "Chemical Sensors Based on Randomly Stacked Graphene Flakes",

abstract = " We demonstrate a simple fabrication method to produce randomly stacked graphene chemiresistors using surfactant-assisted exfoliation of graphite. We analyze the sensitivity of such chemiresistors as a function of vacuum filtration volume and temperature. At low vacuum filtration volumes (<∼5 mL) the sensors exhibit superior sensitivity towards target molecules compared to previously developed polycrystalline graphene, polycrystalline graphene microribbon, and carbon nanotube chemical sensors. Temperature dependent measurements, transmission electron microscopy and scanning electron microscopy suggest the improved sensitivity in the randomly stacked graphene chemiresistors is due to 2-dimensional charge carrier hopping through edge defects.",

keywords = "carbon nanotubes, chemical sensors, filtration, graphene, graphite, resistors, scanning electron microscopy, transmission electron microscopy",

author = "Amin Salehi-Khojin and David Estrada and Lin, \{Kevin Y.\} and Ke Ran and Haasch, \{Richard T.\} and Jian-Min Zuo and Eric Pop and Masel, \{Richard I.\}",

year = "2012",

month = jan,

day = "16",

doi = "10.1063/1.3676276",

language = "American English",

volume = "100",

number = "3",

}

TY - JOUR

T1 - Chemical Sensors Based on Randomly Stacked Graphene Flakes

AU - Salehi-Khojin, Amin

AU - Estrada, David

AU - Lin, Kevin Y.

AU - Ran, Ke

AU - Haasch, Richard T.

AU - Zuo, Jian-Min

AU - Pop, Eric

AU - Masel, Richard I.

PY - 2012/1/16

Y1 - 2012/1/16

N2 - We demonstrate a simple fabrication method to produce randomly stacked graphene chemiresistors using surfactant-assisted exfoliation of graphite. We analyze the sensitivity of such chemiresistors as a function of vacuum filtration volume and temperature. At low vacuum filtration volumes (<∼5 mL) the sensors exhibit superior sensitivity towards target molecules compared to previously developed polycrystalline graphene, polycrystalline graphene microribbon, and carbon nanotube chemical sensors. Temperature dependent measurements, transmission electron microscopy and scanning electron microscopy suggest the improved sensitivity in the randomly stacked graphene chemiresistors is due to 2-dimensional charge carrier hopping through edge defects.

AB - We demonstrate a simple fabrication method to produce randomly stacked graphene chemiresistors using surfactant-assisted exfoliation of graphite. We analyze the sensitivity of such chemiresistors as a function of vacuum filtration volume and temperature. At low vacuum filtration volumes (<∼5 mL) the sensors exhibit superior sensitivity towards target molecules compared to previously developed polycrystalline graphene, polycrystalline graphene microribbon, and carbon nanotube chemical sensors. Temperature dependent measurements, transmission electron microscopy and scanning electron microscopy suggest the improved sensitivity in the randomly stacked graphene chemiresistors is due to 2-dimensional charge carrier hopping through edge defects.

KW - carbon nanotubes

KW - chemical sensors

KW - filtration

KW - graphene

KW - graphite

KW - resistors

KW - scanning electron microscopy

KW - transmission electron microscopy

U2 - 10.1063/1.3676276

DO - 10.1063/1.3676276

M3 - Article

SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

ER -

Chemical Sensors Based on Randomly Stacked Graphene Flakes

Abstract

Keywords

EGS Disciplines

Access to Document

Fingerprint

Cite this