Solid-State Label-Free Integrated Aptasensor Based on Graphene-Mesoporous Silica–Gold Nanoparticle Hybrids and Silver Microspheres

2011 ◽  
Vol 83 (20) ◽  
pp. 8035-8040 ◽  
Author(s):  
Shaojun Guo ◽  
Yan Du ◽  
Xuan Yang ◽  
Shaojun Dong ◽  
Erkang Wang
Keyword(s):  
Solid State ◽  
Mesoporous Silica ◽  
Gold Nanoparticle ◽  
Label Free ◽  
State Label

Label-free electrochemical immunosensor based on gold nanoparticle/polyethyleneimine/reduced graphene oxide nanocomposite for the ultrasensitive detection of cancer biomarker matrix metalloproteinase-1

The Analyst ◽  
2021 ◽  
Author(s):  
Xinke Liu ◽  
Lu-Yin Lin ◽  
Fu-Yen Tseng ◽  
Yu-Cheng Tan ◽  
Jian Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Matrix Metalloproteinase ◽  
Gold Nanoparticle ◽  
Reduced Graphene Oxide ◽  
Electrochemical Immunosensor ◽  
Ultrasensitive Detection ◽  
Label Free ◽  
Matrix Metalloproteinase 1 ◽  
Reduced Graphene ◽  
P Matrix

Matrix metalloproteinase-1 (MMP-1) is associated with many types of cancers, including oral, colorectal, and brain cancers. This paper describes the fabrication of an MMP-1 immunosensor based on a gold nanoparticle/polyethyleneimine/reduced...

Solid-state NMR studies of non-ionic surfactants confined in mesoporous silica

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gerd Buntkowsky ◽  
Sonja Döller ◽  
Nadia Haro-Mares ◽  
Torsten Gutmann ◽  
Markus Hoffmann
Keyword(s):  
Solid State ◽  
Mesoporous Silica ◽  
Solid State Nmr ◽  
Role Models ◽  
Nmr Studies ◽  
Guest Molecules ◽  
Host Interactions ◽  
Functionalized Mesoporous Silica ◽  
Current Trends ◽  
Silica Materials

Abstract This review gives an overview of current trends in the investigation of confined molecules such as higher alcohols, ethylene glycol and polyethylene glycol as guest molecules in neat and functionalized mesoporous silica materials. All these molecules have both hydrophobic and hydrophilic parts. They are characteristic role-models for the investigation of confined surfactants. Their properties are studied by a combination of solid-state NMR and relaxometry with other physicochemical techniques and molecular dynamics techniques. It is shown that this combination delivers unique insights into the structure, arrangement, dynamical properties and the guest-host interactions inside the confinement.

Solid-state 27Al Nuclear Magnetic Resonance Investigation of Plasma-facilitated NOx Reduction Catalysts

2002 ◽  
Vol 17 (7) ◽  
pp. 1843-1848 ◽  
Author(s):  
Li-Qiong Wang ◽  
Christopher L. Aardahl ◽  
Kenneth G. Rappé ◽  
Diana N. Tran ◽  
Marisol A. Delgado ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Mesoporous Silica ◽  
Catalytic Reduction ◽  
Nox Reduction ◽  
Sodium Aluminate ◽  
Acid Sites ◽  
Structural Defects ◽  
Nuclear Magnetic

Aluminum coordination distribution for alumina catalysts supported on mesoporous silica was examined. It was shown that aluminum coordination correlates to activity of the catalysts for plasma-enhanced, selective catalytic reduction of NOx with propene. Catalysts were prepared by incorporating aluminum onto the surface of a mesoporous silica support via three different post-synthesis routes to produce varying aluminum coordination. Aluminum trichloride, sodium aluminate, and aluminum isopropoxide precursors were examined. High-resolution, solid state 27Al nuclear magnetic resonance was used to determine aluminum coordination distributions for the resulting catalysts. Unsaturated aluminum sites (i.e., structural defects) correlated with increased activity at high temperatures while tetrahedrally-coordinated aluminum or BrØnsted acid sites correlated with activity at low temperatures.

Technology for Formation of Hybrid Microfluidic Biosensor Systems for Label-Free Fluorimetric Express Detection of Protein Structures based on Molecular Recognition

2021 ◽  
Vol 23 (6) ◽  
pp. 300-306
Author(s):  
N.O. Sitkov ◽  
◽  
T.M. Zimina ◽  
V.V. Luchinin ◽  
A.A. Kolobov ◽  
...  
Keyword(s):  
Solid State ◽  
Comparative Study ◽  
Chemical Modification ◽  
Protein Structures ◽  
Microfluidic Channels ◽  
Label Free ◽  
Biomedical Analysis ◽  
Surface Deposition ◽  
Working Surface ◽  
Microfluidic Biosensor

The development and comparative study of technologies for manufacturing elements of hybrid biosensor systems intended for express biomedical analysis has been carried out. The technological process included the formation of the relief of microfluidic channels, chemical modification of their working surface, deposition of solid-state phosphor layers, sealing of the system, installation of inlet ports and packaging.

A Label-Free Gold-Nanoparticle-Based SERS Assay for Direct Cyanide Detection at the Parts-per-Trillion Level

2011 ◽  
Vol 17 (30) ◽  
pp. 8445-8451 ◽  
Author(s):  
Dulal Senapati ◽  
Samuel S. R. Dasary ◽  
Anant K. Singh ◽  
Tapas Senapati ◽  
Hongtao Yu ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Label Free ◽  
Free Gold
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