Luminescent Self-Assembled Monolayer on Gold Nanoparticles: Tuning of Emission According to the Surface Curvature

被引：15

作者：

Candreva, Angela ^{[1
,2
]}

Di Maio, Giuseppe ^{[1
]}

Parisi, Francesco ^{[1
]}

Scarpelli, Francesca ^{[1
]}

Crispini, Alessandra ^{[1
]}

Godbert, Nicolas ^{[1
]}

Ricciardi, Loredana ^{[2
]}

Nucera, Antonello ^{[3
]}

Rizzuto, Carmen ^{[3
]}

Barberi, Riccardo C. ^{[2
,3
]}

Castriota, Marco ^{[2
,3
]}

La Deda, Massimo ^{[1
,2
]}

机构：

[1] Univ Calabria, Dept Chem & Chem Technol, I-87036 Arcavacata Di Rende, Italy

[2] Natl Res Council CNR, Inst Nanotechnol NANOTEC, UOS Cosenza, I-87036 Arcavacata Di Rende, Italy

[3] Univ Calabria, Dept Phys, I-87036 Arcavacata Di Rende, Italy

来源：

CHEMOSENSORS | 2022年 / 10卷 / 05期

关键词：

self-assembled monolayer; gold nanorods; gold nanotriangles; gold nanospheres; emission spectroscopy; the curvature of nanosurface; SERS; ENHANCED RAMAN-SCATTERING; PLASMON RESONANCE; LIQUID-CRYSTALS; METAL; COMPLEXES; SPECTROSCOPY; ADSORPTION; GROWTH; DOTS;

D O I：

10.3390/chemosensors10050176

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Until now, the ability to form a self-assembled monolayer (SAM) on a surface has been investigated according to deposition techniques, which in turn depend on surface-coater interactions. In this paper, we pursued two goals: to form a SAM on a gold nanosurface and to correlate its formation to the nanosurface curvature. To achieve these objectives, gold nanoparticles of different shapes (spheres, rods, and triangles) were functionalized with a luminescent thiolated bipyridine (Bpy-SH), and the SAM formation was studied by investigating the photo-physics of Bpy-SH. We have shown that emission wavelength and excited-state lifetime of Bpy-SH are strongly correlated to the formation of specific aggregates within SAMs, the nature of these aggregates being in close correlation to the shape of the nanoparticles. Micro-Raman spectroscopy investigation was used to test the SERS effect of gold nanoparticles on thiolated bipyridine forming SAMs.

引用

页数：17

共 62 条

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