Controlled electrodeposition of gold on graphene: maximization of the defect-enhanced Raman scattering response

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Controlled electrodeposition of gold on graphene : maximization of the defect-enhanced Raman scattering response. / Ananthoj, Balakrishna; Biroju, Ravi K.; Theis, Wolfgang; Dryfe, Robert A. W.

In: Small, Vol. 15, No. 48, 1901555, 01.11.2019, p. 1-10.

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@article{8f1533c482d046878059a5a9a8b09a2d,
title = "Controlled electrodeposition of gold on graphene: maximization of the defect-enhanced Raman scattering response",
abstract = "A reliable method to prepare a surface-enhanced Raman scattering (SERS) active substrate is developed herein, by electrodeposition of gold nanoparticles (Au NPs) on defect-engineered, large area chemical vapour deposition graphene (GR). A plasma treatment strategy is used in order to engineer the structural defects on the basal plane of large area single-layer graphene. This defect-engineered Au functionalized GR, offers reproducible SERS signals over the large area GR surface. The Raman data, along with X-ray photoelectron spectroscopy and analysis of the water contact angle are used to rationalize the functionalization of the graphene layer. It is found that Au NPs functionalization of the “defect-engineered” graphene substrates permits detection of concentrations as low as 10 −16 m for the probe molecule Rhodamine B, which offers an outstanding molecular sensing ability. Interestingly, a Raman signal enhancement of up to ≈10 8 is achieved. Moreover, it is observed that GR effectively quenches the fluorescence background from the Au NPs and molecules due to the strong resonance energy transfer between Au NPs and GR. The results presented offer significant direction for the design and fabrication of ultra-sensitive SERS platforms, and also open up possibilities for novel applications of defect engineered graphene in biosensors, catalysis, and optoelectronic devices. ",
keywords = "graphene, plasma, defects, Raman spectroscopy",
author = "Balakrishna Ananthoj and Biroju, {Ravi K.} and Wolfgang Theis and Dryfe, {Robert A. W.}",
year = "2019",
month = nov,
day = "1",
doi = "10.1002/smll.201901555",
language = "English",
volume = "15",
pages = "1--10",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "48",

}

RIS

TY - JOUR

T1 - Controlled electrodeposition of gold on graphene

T2 - maximization of the defect-enhanced Raman scattering response

AU - Ananthoj, Balakrishna

AU - Biroju, Ravi K.

AU - Theis, Wolfgang

AU - Dryfe, Robert A. W.

PY - 2019/11/1

Y1 - 2019/11/1

N2 - A reliable method to prepare a surface-enhanced Raman scattering (SERS) active substrate is developed herein, by electrodeposition of gold nanoparticles (Au NPs) on defect-engineered, large area chemical vapour deposition graphene (GR). A plasma treatment strategy is used in order to engineer the structural defects on the basal plane of large area single-layer graphene. This defect-engineered Au functionalized GR, offers reproducible SERS signals over the large area GR surface. The Raman data, along with X-ray photoelectron spectroscopy and analysis of the water contact angle are used to rationalize the functionalization of the graphene layer. It is found that Au NPs functionalization of the “defect-engineered” graphene substrates permits detection of concentrations as low as 10 −16 m for the probe molecule Rhodamine B, which offers an outstanding molecular sensing ability. Interestingly, a Raman signal enhancement of up to ≈10 8 is achieved. Moreover, it is observed that GR effectively quenches the fluorescence background from the Au NPs and molecules due to the strong resonance energy transfer between Au NPs and GR. The results presented offer significant direction for the design and fabrication of ultra-sensitive SERS platforms, and also open up possibilities for novel applications of defect engineered graphene in biosensors, catalysis, and optoelectronic devices.

AB - A reliable method to prepare a surface-enhanced Raman scattering (SERS) active substrate is developed herein, by electrodeposition of gold nanoparticles (Au NPs) on defect-engineered, large area chemical vapour deposition graphene (GR). A plasma treatment strategy is used in order to engineer the structural defects on the basal plane of large area single-layer graphene. This defect-engineered Au functionalized GR, offers reproducible SERS signals over the large area GR surface. The Raman data, along with X-ray photoelectron spectroscopy and analysis of the water contact angle are used to rationalize the functionalization of the graphene layer. It is found that Au NPs functionalization of the “defect-engineered” graphene substrates permits detection of concentrations as low as 10 −16 m for the probe molecule Rhodamine B, which offers an outstanding molecular sensing ability. Interestingly, a Raman signal enhancement of up to ≈10 8 is achieved. Moreover, it is observed that GR effectively quenches the fluorescence background from the Au NPs and molecules due to the strong resonance energy transfer between Au NPs and GR. The results presented offer significant direction for the design and fabrication of ultra-sensitive SERS platforms, and also open up possibilities for novel applications of defect engineered graphene in biosensors, catalysis, and optoelectronic devices.

KW - graphene

KW - plasma

KW - defects

KW - Raman spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=85066117264&partnerID=8YFLogxK

U2 - 10.1002/smll.201901555

DO - 10.1002/smll.201901555

M3 - Article

VL - 15

SP - 1

EP - 10

JO - Small

JF - Small

SN - 1613-6810

IS - 48

M1 - 1901555

ER -