Cu@Au self-assembled nanoparticles as SERS-active substrates for (bio)molecular sensing

Gema Cabello; Kenneth C. Nwoko; José F. Marco; María Sánchez-Arenillas; Ana María Méndez-Torres; Jorg Feldmann; Claudia Yáñez; Tim A.D. Smith

doi:10.1016/j.jallcom.2019.03.279

Cu@Au self-assembled nanoparticles as SERS-active substrates for (bio)molecular sensing

Gema Cabello
, Kenneth C. Nwoko
, José F. Marco
, María Sánchez-Arenillas
, Ana María Méndez-Torres
, Jorg Feldmann
, Claudia Yáñez
, Tim A.D. Smith

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

30 Scopus citations

Abstract

Cu⁰(core)-Au⁰(shell) (Cu@Au) bimetallic nanoparticles (NPs) synthesized under microwave-assisted heating were interrogated for surface enhanced Raman scattering (SERS)-active substrates. NPs characterization, by XRD, XPS and UV/vis spectroscopy, showed the formation of self-assembled particles with the occurrence of electron transfer from Cu to Au and the absence of Cu_xO. TEM and AF4 demonstrated NPs with a mean diameter of 4.7 nm. Despite the low LSPR shown by small nanoparticles (<10 nm diameter), our Cu@Au NPs showed enhanced SERS effect, demonstrated by the calculated scattering signal enhancement factor (3 × 10⁵), which may be related to electromagnetic coupling. Selected examples of analytes of interest, including some biomolecules, were studied to demonstrate the versatility of our Cu@Au NPs as SERS-active substrates.

Original language	English
Pages (from-to)	184-192
Number of pages	9
Journal	Journal of Alloys and Compounds
Volume	791
DOIs	https://doi.org/10.1016/j.jallcom.2019.03.279
State	Published - 30 Jun 2019
Externally published	Yes

Keywords

Bimetallic nanoparticles
Biochemical sensing
Core-shell
Microwave-assisted heating
SERS substrate

Access to Document

10.1016/j.jallcom.2019.03.279

Cite this

@article{a67e8edd61aa46b8be80348f861190fd,

title = "Cu@Au self-assembled nanoparticles as SERS-active substrates for (bio)molecular sensing",

abstract = "Cu0(core)-Au0(shell) (Cu@Au) bimetallic nanoparticles (NPs) synthesized under microwave-assisted heating were interrogated for surface enhanced Raman scattering (SERS)-active substrates. NPs characterization, by XRD, XPS and UV/vis spectroscopy, showed the formation of self-assembled particles with the occurrence of electron transfer from Cu to Au and the absence of CuxO. TEM and AF4 demonstrated NPs with a mean diameter of 4.7 nm. Despite the low LSPR shown by small nanoparticles (<10 nm diameter), our Cu@Au NPs showed enhanced SERS effect, demonstrated by the calculated scattering signal enhancement factor (3 × 105), which may be related to electromagnetic coupling. Selected examples of analytes of interest, including some biomolecules, were studied to demonstrate the versatility of our Cu@Au NPs as SERS-active substrates.",

keywords = "Bimetallic nanoparticles, Biochemical sensing, Core-shell, Microwave-assisted heating, SERS substrate",

author = "Gema Cabello and Nwoko, \{Kenneth C.\} and Marco, \{Jos{\'e} F.\} and Mar{\'i}a S{\'a}nchez-Arenillas and M{\'e}ndez-Torres, \{Ana Mar{\'i}a\} and Jorg Feldmann and Claudia Y{\'a}{\~n}ez and Smith, \{Tim A.D.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = jun,

day = "30",

doi = "10.1016/j.jallcom.2019.03.279",

language = "English",

volume = "791",

pages = "184--192",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

}

TY - JOUR

T1 - Cu@Au self-assembled nanoparticles as SERS-active substrates for (bio)molecular sensing

AU - Cabello, Gema

AU - Nwoko, Kenneth C.

AU - Marco, José F.

AU - Sánchez-Arenillas, María

AU - Méndez-Torres, Ana María

AU - Feldmann, Jorg

AU - Yáñez, Claudia

AU - Smith, Tim A.D.

PY - 2019/6/30

Y1 - 2019/6/30

N2 - Cu0(core)-Au0(shell) (Cu@Au) bimetallic nanoparticles (NPs) synthesized under microwave-assisted heating were interrogated for surface enhanced Raman scattering (SERS)-active substrates. NPs characterization, by XRD, XPS and UV/vis spectroscopy, showed the formation of self-assembled particles with the occurrence of electron transfer from Cu to Au and the absence of CuxO. TEM and AF4 demonstrated NPs with a mean diameter of 4.7 nm. Despite the low LSPR shown by small nanoparticles (<10 nm diameter), our Cu@Au NPs showed enhanced SERS effect, demonstrated by the calculated scattering signal enhancement factor (3 × 105), which may be related to electromagnetic coupling. Selected examples of analytes of interest, including some biomolecules, were studied to demonstrate the versatility of our Cu@Au NPs as SERS-active substrates.

AB - Cu0(core)-Au0(shell) (Cu@Au) bimetallic nanoparticles (NPs) synthesized under microwave-assisted heating were interrogated for surface enhanced Raman scattering (SERS)-active substrates. NPs characterization, by XRD, XPS and UV/vis spectroscopy, showed the formation of self-assembled particles with the occurrence of electron transfer from Cu to Au and the absence of CuxO. TEM and AF4 demonstrated NPs with a mean diameter of 4.7 nm. Despite the low LSPR shown by small nanoparticles (<10 nm diameter), our Cu@Au NPs showed enhanced SERS effect, demonstrated by the calculated scattering signal enhancement factor (3 × 105), which may be related to electromagnetic coupling. Selected examples of analytes of interest, including some biomolecules, were studied to demonstrate the versatility of our Cu@Au NPs as SERS-active substrates.

KW - Bimetallic nanoparticles

KW - Biochemical sensing

KW - Core-shell

KW - Microwave-assisted heating

KW - SERS substrate

UR - https://www.scopus.com/pages/publications/85063323104

U2 - 10.1016/j.jallcom.2019.03.279

DO - 10.1016/j.jallcom.2019.03.279

M3 - Article

AN - SCOPUS:85063323104

SN - 0925-8388

VL - 791

SP - 184

EP - 192

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Cu@Au self-assembled nanoparticles as SERS-active substrates for (bio)molecular sensing

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this