Silica gels with tailored, gold nanorod-driven optical functionalities

2004 ◽  
Vol 226 (1-3) ◽  
pp. 137-143 ◽  
Author(s):  
Jorge Pérez-Juste ◽  
Miguel A. Correa-Duarte ◽  
Luis M. Liz-Marzán
Keyword(s):  
Gold Nanorod ◽  
Silica Gels

Small angle scattering study of silica gels and zeolites

1993 ◽  
Vol 03 (C8) ◽  
pp. C8-393-C8-396
Author(s):  
T. P.M. BEELEN ◽  
W. H. DOKTER ◽  
H. F. VAN GARDEREN ◽  
R. A. VAN SANTEN ◽  
E. PANTOS
Keyword(s):  
Small Angle ◽  
Small Angle Scattering ◽  
Silica Gels ◽  
Angle Scattering ◽  
Scattering Study

Hybrid Micro-Optical Sensors via Sol-Gel Soft Lithography

2000 ◽  
Vol 628 ◽  
Author(s):  
Mark A. Clarner ◽  
Michael J. Lochhead
Keyword(s):  
Optical Sensors ◽  
Soft Lithography ◽  
Sol Gel ◽  
Silica Gels ◽  
Ph Sensing ◽  
Ambient Conditions ◽  
Sensor Applications ◽  
Patterned Structures ◽  
Biological Functionality ◽  
Indicator Dyes

ABSTRACTOrganically modified silica gels and dye-doped silica gels have been patterned into micrometer-scale structures on a substrate using micro molding in capillaries (MIMIC). This approach is from a class of elastomeric stamping and molding techniques collectively known as soft lithography. Soft lithography and sol-gel processing share attractive features in that they are relatively benign processes performed at ambient conditions, which makes both techniques compatible with a wide variety of organic molecules, molecular assemblies, and biomolecules. The combination of sol-gel and soft lithography, therefore, holds enormous promise as a tool for microfabrication of materials with optical, chemical, or biological functionality that are not readily patterned with conventional methods. This paper describes our investigation of micro-patterned organic-inorganic hybrid materials containing indicator dyes for microfluidic sensor applications. Reversible colorimetric pH sensing via entrapped reagents is demonstrated in a prototype microfluidic sensor element. Patterned structures range from one to tens of micrometers in cross-section and are up to centimeters in length. Fundamental chemical processing issues associated with mold filling, cracking and sensor stability are discussed.

Nanoparticle‐Reinforced Silica Gels with Enhanced Mechanical Properties and Excellent pH‐Sensing Performance

2020 ◽  
Vol 37 (2) ◽  
pp. 1900404
Author(s):  
Xinyuan Xie ◽  
Yingshi Deng ◽  
Jiehui Peng ◽  
Shiqi Zheng ◽  
Chezheng Cao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silica Gels ◽  
Ph Sensing ◽  
Sensing Performance

scholarly journals Effect of Hydrophobic Silica Nanochannel Structure on the Running Speed of a Colloidal Damper

2021 ◽  
Vol 11 (15) ◽  
pp. 6808
Author(s):  
Gengbiao Chen ◽  
Zhiwen Liu
Keyword(s):  
Fractal Dimension ◽  
Silica Gel ◽  
Fractal Theory ◽  
Percolation Model ◽  
Silica Gels ◽  
Practical Significance ◽  
Running Speed ◽  
Fractal Percolation ◽  
Micropore Structure ◽  
Hydrophobic Silica

A colloidal damper (CD) can dissipate a significant amount of vibrations and impact energy owing to the interface power that is generated when it is used. It is of great practical significance to study the influence of the nanochannel structure of hydrophobic silica gel in the CD damping medium on the running speed of the CD. The fractal theory was applied to observe the characteristics of the micropore structure of the hydrophobic silica gel by scanning electron microscopy (SEM), the primary particles were selected to carry out fractal analysis, and the two-dimensional fractal dimension of the pore area and the tortuous fractal dimension of the hydrophobic silica gel pore structure were calculated. The fractal percolation model of water in hydrophobic silica nanochannels based on the slip theory could thus be obtained. This model revealed the relationship between the micropore structure parameters of the silica gel and the running speed of the CD. The CD running speed increases with the addition of grafted molecules and the reduction in pore size of the silica gel particles. Continuous loading velocity testing of the CD loaded with hydrophobic silica gels with different pore structures was conducted. By comparing the experimental results with the calculation results of the fractal percolation model, it was determined that the fractal percolation model can better characterize the change trend of the CD running velocity for the first loading, but the fractal dimension was changed from the second loading, caused by the small amount of water retained in the nanochannel, leading to the failure of fractal characterization.

scholarly journals Gold Nanorod Hydrogel Film for Laser‐Induced HIPEC to Treat Peritoneal Malignancies

2021 ◽  
pp. 2100036
Author(s):  
Karem A. Court ◽  
Hangjin Yu ◽  
Diana Chan ◽  
Elvin Blanco ◽  
Arturas Ziemys ◽  
...  
Keyword(s):  
Gold Nanorod ◽  
Hydrogel Film

scholarly journals Thermal analysis of laser irradiation-gold nanorod combinations at 808 nm, 940 nm, 975 nm and 1064 nm wavelengths in breast cancer model

2021 ◽  
Vol 38 (1) ◽  
pp. 1099-1110
Author(s):  
Leonardo Bianchi ◽  
Rachael Mooney ◽  
Yvonne R. Cornejo ◽  
Emiliano Schena ◽  
Jacob M. Berlin ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Thermal Analysis ◽  
Laser Irradiation ◽  
Gold Nanorod ◽  
Cancer Model ◽  
Breast Cancer Model

Relaxation of excitations in porous silica gels

1988 ◽  
Vol 128 (1) ◽  
pp. 199-207 ◽  
Author(s):  
J.M. Drake ◽  
P. Levitz ◽  
S.K. Sinha ◽  
J. Klafter
Keyword(s):  
Porous Silica ◽  
Silica Gels
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