New Insights into SERS Mechanism of Semiconductor-Metal Heterostructure: A Case Study on Vanadium Pentoxide Nanoparticles Decorated with Gold

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10490065" target="_blank" >RIV/00216208:11320/24:10490065 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1Ap0e9rh0n" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1Ap0e9rh0n</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.4c03080" target="_blank" >10.1021/acs.jpcc.4c03080</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New Insights into SERS Mechanism of Semiconductor-Metal Heterostructure: A Case Study on Vanadium Pentoxide Nanoparticles Decorated with Gold

Popis výsledku v původním jazyce

Recently, vanadium oxides and other semiconductor materials have been intensively studied to use them as nonplasmonic substrates for surface-enhanced Raman scattering (SERS) spectroscopy due to their advantages such as greater uniformity, stability, and spectral reproducibility compared to plasmonic ones. The combination of vanadium pentoxide nanoparticles (V(2)O(5) NPs) with nanostructures of noble metals has shown considerable promise for enhancing the SERS signal, while maintaining the aforementioned advantages. We prepared V(2)O(5)/Au NP films by a novel, simple, fully solvent- and linker-free method: the gas-phase synthesis of vanadium NPs followed by their thermal annealing at 550 degrees C to obtain V(2)O(5) NP films, which were subsequently decorated with Au nanoislands. Using methylene blue (MB) solution as a test analyte, we observed a significant enhancement of the SERS signal (up to 65 times) from the V(2)O(5)/Au composite compared to those from pure V(2)O(5) substrates. The SERS enhancement in this case arises from the synergy of electromagnetic and chemical (charge-transfer) enhancement. The deposition of Au on the V(2)O(5) surface increases the charge-transfer contribution. Moreover, the additional enhancement is achieved due to electromagnetic field coupling between V(2)O(5) and Au or between neighboring Au nanostructures. The observation of two maxima of MB SERS signal from the V(2)O(5)/Au heterostructure for various Au deposition times brings new insights into the SERS mechanism of the semiconductor-metal heterostructure. Spectral mapping across the V(2)O(5)/Au substrates shows excellent homogeneity and spectral reproducibility (RSD of the SERS signal less than 10%). This study introduces an important step in designing novel semiconductor-metal SERS-active substrates. Our V(2)O(5)/Au heterostructures represent highly attractive substrates with improved stability and spectral reproducibility as compared to other nonplasmonic and plasmonic ones.

Název v anglickém jazyce

New Insights into SERS Mechanism of Semiconductor-Metal Heterostructure: A Case Study on Vanadium Pentoxide Nanoparticles Decorated with Gold

Popis výsledku anglicky

Recently, vanadium oxides and other semiconductor materials have been intensively studied to use them as nonplasmonic substrates for surface-enhanced Raman scattering (SERS) spectroscopy due to their advantages such as greater uniformity, stability, and spectral reproducibility compared to plasmonic ones. The combination of vanadium pentoxide nanoparticles (V(2)O(5) NPs) with nanostructures of noble metals has shown considerable promise for enhancing the SERS signal, while maintaining the aforementioned advantages. We prepared V(2)O(5)/Au NP films by a novel, simple, fully solvent- and linker-free method: the gas-phase synthesis of vanadium NPs followed by their thermal annealing at 550 degrees C to obtain V(2)O(5) NP films, which were subsequently decorated with Au nanoislands. Using methylene blue (MB) solution as a test analyte, we observed a significant enhancement of the SERS signal (up to 65 times) from the V(2)O(5)/Au composite compared to those from pure V(2)O(5) substrates. The SERS enhancement in this case arises from the synergy of electromagnetic and chemical (charge-transfer) enhancement. The deposition of Au on the V(2)O(5) surface increases the charge-transfer contribution. Moreover, the additional enhancement is achieved due to electromagnetic field coupling between V(2)O(5) and Au or between neighboring Au nanostructures. The observation of two maxima of MB SERS signal from the V(2)O(5)/Au heterostructure for various Au deposition times brings new insights into the SERS mechanism of the semiconductor-metal heterostructure. Spectral mapping across the V(2)O(5)/Au substrates shows excellent homogeneity and spectral reproducibility (RSD of the SERS signal less than 10%). This study introduces an important step in designing novel semiconductor-metal SERS-active substrates. Our V(2)O(5)/Au heterostructures represent highly attractive substrates with improved stability and spectral reproducibility as compared to other nonplasmonic and plasmonic ones.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

<a href="/cs/project/GA22-16667S" target="_blank" >GA22-16667S: Syntéza nanomateriálů na bázi oxidů kovů pro povrchem zesílenou Ramanovu spektroskopii pomocí plazmových plynně agregačních zdrojů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

1932-7455

Svazek periodika

128

Číslo periodika v rámci svazku

28

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

11732-11740

Kód UT WoS článku

001265547500001

EID výsledku v databázi Scopus

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