Gold Nanorods as a High-Pressure Sensor of Phase Transitions and Refractive-Index Gauge

2019 ◽  
Author(s):  
Marcin Runowski ◽  
Szymon Sobczak ◽  
Jedrzej Marciniak ◽  
Ida Bukalska ◽  
Stefan Lis ◽  
...  
Keyword(s):  
High Pressure ◽  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Phase Transitions ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Surrounding Medium ◽  
Direct Interaction ◽  
Nir Spectroscopy ◽  
Highly Sensitive

<div>The absorption peaks of surface plasmon resonance (SPR) in Au NRs are highly sensitive to their surrounding medium and to its refractive index (<i>RI</i>) changes. However, no applications of NRs for detecting phase transitions have been reported. Here we show that Au NRs effectively detect phase transitions of compressed compounds, liquid and solid, by measuring their <i>RI</i>. Owing to the direct interaction of the NRs with their surrounding medium, its subtle <i>RI</i> changes can be observed by the use of high-pressure absorption Vis-NIR spectroscopy.</div><b></b>

Gold Nanorods as a High-Pressure Sensor of Phase Transitions and Refractive-Index Gauge

2019 ◽  
Author(s):  
Marcin Runowski ◽  
Szymon Sobczak ◽  
Jedrzej Marciniak ◽  
Ida Bukalska ◽  
Stefan Lis ◽  
...  
Keyword(s):  
High Pressure ◽  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Phase Transitions ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Surrounding Medium ◽  
Direct Interaction ◽  
Nir Spectroscopy ◽  
Highly Sensitive

<div>The absorption peaks of surface plasmon resonance (SPR) in Au NRs are highly sensitive to their surrounding medium and to its refractive index (<i>RI</i>) changes. However, no applications of NRs for detecting phase transitions have been reported. Here we show that Au NRs effectively detect phase transitions of compressed compounds, liquid and solid, by measuring their <i>RI</i>. Owing to the direct interaction of the NRs with their surrounding medium, its subtle <i>RI</i> changes can be observed by the use of high-pressure absorption Vis-NIR spectroscopy.</div><b></b>

Gold nanorods as a high-pressure sensor of phase transitions and refractive-index gauge

Nanoscale ◽  
2019 ◽  
Vol 11 (18) ◽  
pp. 8718-8726 ◽  
Author(s):  
Marcin Runowski ◽  
Szymon Sobczak ◽  
Jędrzej Marciniak ◽  
Ida Bukalska ◽  
Stefan Lis ◽  
...  
Keyword(s):  
High Pressure ◽  
Refractive Index ◽  
Phase Transitions ◽  
Gold Nanorods ◽  
Pressure Sensor ◽  
Nir Spectroscopy ◽  
Au Nanorods

SPR vis-NIR spectroscopy of Au nanorods conveniently detects phase transitions and measures the refractive index under high pressure.

Highly sensitive and wide-dynamic-range liquid-prism surface plasmon resonance refractive index sensor based on the phase and angular interrogations

2016 ◽  
Vol 14 (2) ◽  
pp. 022401-22405 ◽  
Author(s):  
Guoqiang Lan Guoqiang Lan ◽  
Shugang Liu Shugang Liu ◽  
Xueru Zhang Xueru Zhang ◽  
Yuxiao Wang Yuxiao Wang ◽  
and Yinglin Song and Yinglin Song
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Dynamic Range ◽  
Refractive Index Sensor ◽  
Wide Dynamic Range ◽  
Highly Sensitive

Analysis of Localized Surface Plasmon Resonance in Ag/ITO/CdS/SiO2 Multilayered Nanostructured Composite

NANO ◽  
2015 ◽  
Vol 10 (08) ◽  
pp. 1550117
Author(s):  
Chao Liu ◽  
Jingwei Lv ◽  
Famei Wang ◽  
Qiang Liu ◽  
Haiwei Mu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Surrounding Medium ◽  
Blue Shift ◽  
Red Shift ◽  
Localized Surface Plasmon ◽  
Extinction Spectra

Multilayered nanoshells have attracted much attention due to their unique optical, electronic and magnetic properties. In this work, numerical calculation using discrete dipole approximation (DDA) is conducted to investigate the quad-layered metal nanoshell consisting of a particle with a dielectric silica (SiO2) core, inner cadium sulfide (CdS) shell, middle indium tin oxide (ITO) shell and outer metal silver (Ag) shell. The phenomenon is interpreted by plasmon hybridization theory and the Ag–ITO–CdS–SiO2 multilayered nanoshells are studied by extinction spectra of localized surface plasmon resonance. The variation in the spectrum peak with nanoparticle thickness and refractive index of the surrounding medium is derived. The electric field enhancement contour around the nanoparticles under illumination is analyzed at the plasmon resonance wavelength. The [Formula: see text], [Formula: see text], and [Formula: see text] modes red-shift with the refractive index of the surrounding medium and increase in the layer thickness causes either blue-shift or red-shift as shown by the extinction spectra. The mechanism of the red-shift or blue-shift is discussed. The [Formula: see text] mode blue-shifts and furthermore, the [Formula: see text] and [Formula: see text] modes of the Ag coated multilayered nanostructure are noticeable by comparing the extinction efficiency spectra of the Au–ITO–CdS–SiO2 and Ag–ITO–CdS–SiO2 multilayered nanoshells.

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