Three Generations of Surface Nanocomposites Based on Hexagonally Ordered Gold Nanoparticle Layers and Their Application for Surface-Enhanced Raman Spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F23%3APU148613" target="_blank" >RIV/00216305:26620/23:PU148613 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2227-9040/11/4/235" target="_blank" >https://www.mdpi.com/2227-9040/11/4/235</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/chemosensors11040235" target="_blank" >10.3390/chemosensors11040235</a>

Result language

angličtina

Original language name

Three Generations of Surface Nanocomposites Based on Hexagonally Ordered Gold Nanoparticle Layers and Their Application for Surface-Enhanced Raman Spectroscopy

Original language description

The fabrication technology of surface nanocomposites based on hexagonally ordered gold nanoparticle (AuNP) layers (quasi-arrays) and their possible application as surface-enhanced Raman spectroscopy (SERS) substrates are presented in this paper. The nanoparticle layers are prepared using a nanotextured template formed by porous anodic alumina (PAA) and combined with gold thin-film deposition and subsequent solid-state dewetting. Three types of hexagonal arrangements were prepared with different D/D-0 values (where D is the interparticle gap, and D-0 is the diameter of the ellipsoidal particles) on a large surface area (similar to cm(2) range), namely, 0.65 +/- 0.12, 0.33 +/- 0.10 and 0.21 +/- 0.09. The transfer of the particle arrangements to transparent substrates was optimized through three generations, and the advantages and disadvantages of each transfer technology are discussed in detail. Such densely packed nanoparticle arrangements with high hot-spot density and tunable interparticle gaps are very beneficial for SERS applications, as demonstrated with two practical examples. The substrate-based enhancement factor of the nanocomposites was determined experimentally using a DNA monolayer and was found to be between 4 x 10(4) and 2 x 10(6) for the different particle arrangements. We also determined the sensing characteristics of a small dye molecule, rhodamine 6G (R6G). By optimizing the experimental conditions (e.g., optimizing the laser power and the refractive index of the measurement medium with an ethylene-glycol/water mixture), concentrations as low as 10(-16) M could be detected at 633 nm excitation.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10401 - Organic chemistry

Project

<a href="/en/project/VJ01010123" target="_blank" >VJ01010123: Identification of the perpetrator by forensic analysis of smell and touch traces found at the crime scene</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Chemosensors

ISSN

2227-9040

e-ISSN

—

Volume of the periodical

11

Issue of the periodical within the volume

4

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

1-14

UT code for WoS article

000979106600001

EID of the result in the Scopus database

2-s2.0-85153774375