Acetic Acid and Ammonium Persulfate Pre-Treated Copper Foil for the Improvement of Graphene Quality, Sensitivity and Specificity of Hall Effect Label-Free DNA Hybridization Detection

Autor: Naiyuan Cui, Fei Wang, Hanyuan Ding
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Materials science
hall effect measurement
graphene-based biosensors
DNA hybridization
Inorganic chemistry
02 engineering and technology
010402 general chemistry
lcsh:Technology
01 natural sciences
Article
Corrosion
law.invention
chemistry.chemical_compound
Acetic acid
ammonium persulfate pre-treated copper foil
law
Hall effect
General Materials Science
lcsh:Microscopy
lcsh:QC120-168.85
chemistry.chemical_classification
lcsh:QH201-278.5
lcsh:T
Graphene
Biomolecule
Substrate (chemistry)
021001 nanoscience & nanotechnology
0104 chemical sciences
chemistry
lcsh:TA1-2040
lcsh:Descriptive and experimental mechanics
Ammonium persulfate
lcsh:Electrical engineering. Electronics. Nuclear engineering
lcsh:Engineering (General). Civil engineering (General)
0210 nano-technology
acetic acid pre-treated copper foil
lcsh:TK1-9971
Biosensor
Zdroj: Materials
Volume 13
Issue 7
Materials, Vol 13, Iss 1784, p 1784 (2020)
ISSN: 1996-1944
DOI: 10.3390/ma13071784
Popis: The capability of graphene-based biosensors used to detect biomolecules, such as DNA and cancer marker, is enormously affected by the quality of graphene. In this work, high quality and cleanness graphene were obtained by CVD based on acetic acid (AA) and ammonium persulfate (AP) pretreated copper foil substrate. Hall effect devices were made by three kinds of graphene which were fabricated by CVD using no-treated copper foil, AA pre-treated copper foil and AP pre-treated copper foil. Hall effect devices made of AA pre-treated copper foil CVD graphene and AP pre-treated copper foil CVD graphene can both enhance the sensitivity of graphene-based biosensors for DNA recognition, but the AA pre-treated copper foil CVD graphene improves more (&asymp
4 times). This may be related to the secondary oxidation of AP pre-treated copper foil in the air due to the strong corrosion of ammonium persulfate, which leads to the quality decrease of graphene comparing to acetic acid. Our research provides an efficient method to improve the sensitivity of graphene-based biosensors for DNA recognition and investigates an effect of copper foil oxidation on the growth graphene.
Databáze: OpenAIRE
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