Silver nanowires as infrared-active materials for surface-enhanced Raman scattering

被引：19

作者：

Becucci, Maurizio ^{[1
,2
]}

Bracciali, Monica ^{[3
]}

Ghini, Giacomo ^{[3
]}

Lofrumento, Cristiana ^{[1
]}

Pietraperzia, Giangaetano ^{[1
,2
]}

Ricci, Marilena ^{[1
]}

Tognaccini, Lorenzo ^{[1
]}

Trigari, Silvana ^{[4
]}

Gellini, Cristina ^{[1
]}

Feis, Alessandro ^{[1
]}

机构：

[1] Univ Florence, Dipartimento Chim Ugo Schiff, Via Lastruccia 3, I-50019 Sesto Fiorentino, FI, Italy

[2] Univ Florence, European Lab Non Linear Spect LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy

[3] Cabro SpA, Via Sette Ponti 141 Ioc Tramarino, I-52100 Arezzo, Italy

[4] CNR, Ist Sistemi Complessi, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, FI, Italy

来源：

NANOSCALE | 2018年 / 10卷 / 19期

关键词：

METAL NANOPARTICLES; OPTICAL-PROPERTIES; WAVELENGTH RANGE; GOLD NANOSPHERES; AQUEOUS-SOLUTION; NEAR-FIELD; HUMAN SKIN; SERS TAGS; SPECTROSCOPY; ABSORPTION;

D O I：

10.1039/c8nr00537k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Surface-enhanced Raman scattering (SERS) is increasing in significance as a bioanalytical tool. Novel nanostructured metal substrates are required to improve performances and versatility of SERS spectroscopy. In particular, as biological tissues are relatively transparent in the infrared wavelength range, SERS-active materials suitable for infrared laser excitation are needed. Nanowires appear interesting in this respect as they show a very broad localized surface plasmon resonance band, ranging from near UV to near infrared wavelengths. The SERS activity of silver nanowires has been tested at three wavelengths and a fair enhancement at 1064 and 514 nm has been observed, whereas a very weak enhancement was present when exciting close to the nanowire extinction maximum. These experimentally measured optical properties have been contrasted with finite element method simulations. Furthermore, laser-induced optoacoustic spectroscopy measurements have shown that the extinction at 1064 nm is completely due to scattering. This result has an important implication that no heating occurs when silver nanowires are utilized as SERS-active substrates, thereby preventing possible thermal damage.

引用

页码：9329 / 9337

页数：9

共 94 条

[1] Electric and Magnetic Field Enhancement with Ultralow Heat Radiation Dielectric Nanoantennas: Considerations for Surface-Enhanced Spectroscopies [J].