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@ARTICLE{Fu:838721,
author = {Fu, Wangyang and Feng, Lingyan and Panaitov, Gregory and
Kireev, Dmitry and Mayer, Dirk and Offenhäusser, Andreas
and Krause, Hans-Joachim},
title = {{B}iosensing near the neutrality point of graphene},
journal = {Science advances},
volume = {3},
number = {10},
issn = {2375-2548},
address = {Washington, DC [u.a.]},
publisher = {Assoc.},
reportid = {FZJ-2017-07281},
pages = {e1701247 -},
year = {2017},
abstract = {Over the past decade, the richness of electronic properties
of graphene has attracted enormous interest for electrically
detecting chemical and biological species using this
two-dimensional material. However, the creation of practical
graphene electronic sensors greatly depends on our ability
to understand and maintain a low level of electronic noise,
the fundamental reason limiting the sensor resolution.
Conventionally, to reach the largest sensing response,
graphene transistors are operated at the point of maximum
transconductance, where 1/f noise is found to be unfavorably
high and poses a major limitation in any attempt to further
improve the device sensitivity. We show that operating a
graphene transistor in an ambipolar mode near its neutrality
point can markedly reduce the 1/f noise in graphene.
Remarkably, our data reveal that this reduction in the
electronic noise is achieved with uncompromised sensing
response of the graphene chips and thus significantly
improving the signal-to-noise ratio—compared to that of a
conventionally operated graphene transistor for conductance
measurement. As a proof-of-concept demonstration of the
usage of the aforementioned new sensing scheme to a broader
range of biochemical sensing applications, we selected an
HIV-related DNA hybridization as the test bed and achieved
detections at picomolar concentrations.},
cin = {ICS-8 / JARA-FIT},
ddc = {500},
cid = {I:(DE-Juel1)ICS-8-20110106 / $I:(DE-82)080009_20140620$},
pnm = {552 - Engineering Cell Function (POF3-552) / 553 - Physical
Basis of Diseases (POF3-553) / 523 - Controlling
Configuration-Based Phenomena (POF3-523)},
pid = {G:(DE-HGF)POF3-552 / G:(DE-HGF)POF3-553 /
G:(DE-HGF)POF3-523},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29075669},
UT = {WOS:000417998700028},
doi = {10.1126/sciadv.1701247},
url = {https://juser.fz-juelich.de/record/838721},
}