scholarly journals Plasmonic Sensing of Refractive Index and Density in Methanol–Ethanol Mixtures at High Pressure

2020 ◽  
Vol 124 (16) ◽  
pp. 8978-8983 ◽  
Author(s):  
Camino Martín-Sánchez ◽  
Ana Sánchez-Iglesias ◽  
Paul Mulvaney ◽  
Luis M. Liz-Marzán ◽  
Fernando Rodríguez
Keyword(s):  
High Pressure ◽  
Refractive Index ◽  
Plasmonic Sensing

High pressure refractive index measurements of 4:1 methanol:ethanol

1992 ◽  
Vol 72 (6) ◽  
pp. 2453-2461 ◽  
Author(s):  
Jon H. Eggert ◽  
Li‐wen Xu ◽  
Rong‐zheng Che ◽  
Liang‐chen Chen ◽  
Ji‐fang Wang
Keyword(s):  
High Pressure ◽  
Refractive Index

Behavior of the refractive index of lithium disilicate glass ceramic processed at high pressure and high temperature

2012 ◽  
Vol 34 (5) ◽  
pp. 826-831 ◽  
Author(s):  
Silvio Buchner ◽  
Marcelo Barbalho Pereira ◽  
Naira Maria Balzaretti
Keyword(s):  
High Pressure ◽  
Refractive Index ◽  
High Temperature ◽  
Glass Ceramic ◽  
Lithium Disilicate

Refractive Index Susceptibility of the Plasmonic Palladium Nanoparticle: Potential as the Third Plasmonic Sensing Material

ACS Nano ◽  
2015 ◽  
Vol 9 (2) ◽  
pp. 1895-1904 ◽  
Author(s):  
Kosuke Sugawa ◽  
Hironobu Tahara ◽  
Ayane Yamashita ◽  
Joe Otsuki ◽  
Takamasa Sagara ◽  
...  
Keyword(s):  
Refractive Index ◽  
Palladium Nanoparticle ◽  
The Third ◽  
Plasmonic Sensing ◽  
Sensing Material

High Pressure Liquid Chromatographic Determination of Sorbitol in Bulk Sorbitol

1980 ◽  
Vol 63 (3) ◽  
pp. 664-666 ◽  
Author(s):  
J DOkladalova ◽  
A Y Barton ◽  
E A Mackenzie
Keyword(s):  
High Pressure ◽  
Refractive Index ◽  
Mobile Phase ◽  
Chromatographic Determination ◽  
High Pressure Liquid Chromatographic ◽  
Column Eluate ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic ◽  
Refractive Index Detector

Abstract An HPLC procedure for determining sorbitol in bulk sorbitol is described. An Aminex HPX-87 column (Bio-Rad) is used with water as a mobile phase and with a refractive index detector to monitor column eluate. Sorbitol is separated from pentaerythritol, erythritol, ribitol, ethylene glycol, propylene glycol, arabitol, galactitol, mannitol, iditol, and other carbohydrates. The precision of the sorbitol determination, characterized by a 95% confidence interval, corresponds to ±1.22%.

Density Dependence of Lorentz–Lorenz Coefficient for Sulfur Hexafluoride

1974 ◽  
Vol 52 (20) ◽  
pp. 2007-2010 ◽  
Author(s):  
D. Balzarini ◽  
P. Palffy
Keyword(s):  
High Pressure ◽  
Refractive Index ◽  
Density Dependence ◽  
Sulfur Hexafluoride ◽  
Critical Density ◽  
Small Variation ◽  
Needle Valve ◽  
Density Range ◽  
High Pressure Cell ◽  
Precision Balance

The Lorentz–Lorenz coefficient for sulfur hexafluoride has been measured over the density range 0.1 g/cm3 to 1.3 g/cm3. The critical density has been measured and is 0.736 ± 0.001 g/cm3. Refractive index and density are both measured in the same experiment yielding values of the Lorentz–Lorenz coefficient accurate to 0.05% for densities near critical. The method utilizes a prism-shaped high pressure cell which can be removed from a temperature controlled holder and weighed on a precision balance. The cell is equipped with a needle valve which allows the high pressure gas to be bled out in steps. Refractive index is measured as a function of weight and hence density. Studies of sulfur hexafluoride indicate a small variation of less than 0.5% over the density range covered. A knowledge of the density dependence is necessary for interpretation and verification of the validity of recent experiments near the critical points of pure fluids.

scholarly journals Plasmonic Sensing Characteristics of Gold Nanorods with Large Aspect Ratios

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3458 ◽  
Author(s):  
Chao Zhuang ◽  
Yifan Xu ◽  
Ningsheng Xu ◽  
Jinxiu Wen ◽  
Huanjun Chen ◽  
...  
Keyword(s):  
Refractive Index ◽  
Gold Nanorods ◽  
High Performance ◽  
Near Infrared ◽  
High Refractive Index ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Refractive Index Sensitivity ◽  
Aspect Ratios ◽  
Plasmonic Sensing

Plasmonic gold nanorods play important roles in nowadays state-of-the-art plasmonic sensing techniques. Most of the previous studies and applications focused on gold nanorods with relatively small aspect ratios, where the plasmon wavelengths are smaller than 900 nm. Gold nanorods with large aspect ratios are predicted to exhibit high refractive-index sensitivity (Langmir 2008, 24, 5233–5237), which therefore should be promising for the development of high-performance plasmonic chemical- and bio-sensors. In this study, we developed gold nanorods with aspect ratios over 7.9, which exhibit plasmon resonances around 1064 nm. The refractive index (RI) sensitivity of these nanorods have been evaluated by varying their dielectric environment, whereby a sensitivity as high as 473 nm/RIU (refractive index unit) can be obtained. Furthermore, we have demonstrated the large-aspect-ratio nanorods as efficient substrate for surface enhanced Raman spectroscopy (SERS), where an enhancement factor (EF) as high as 9.47 × 108 was measured using 4-methylbenzenethiol (4-MBT) as probe molecule. Finally, a type of flexible SERS substrate is developed by conjugating the gold nanorods with the polystyrene (PS) polymer. The results obtained in our study can benefit the development of plasmonic sensing techniques utilized in the near-infrared spectral region.

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