Synthesis and optical properties of gold nanoparticle networks cross-linked with chain-length-controlled polymers

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34704-34708 ◽  
Author(s):  
Emi Sugata ◽  
Seiya Kobatake
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Gold Nanoparticle ◽  
Chain Length ◽  
Cross Linking ◽  
Sh Groups

We synthesized gold nanoparticle networks by a cross-linking of gold nanoparticles with chain-length-controlled polymers having SH groups at both termini.

scholarly journals Surface-confined core–shell structures based on gold nanoparticles and metal–organic networks

2014 ◽  
Vol 50 (35) ◽  
pp. 4635-4638 ◽  
Author(s):  
Revital Kaminker ◽  
Michal Lahav ◽  
Marc Altman ◽  
Guennadi Evmenenko ◽  
Pulak Dutta ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Gold Nanoparticle ◽  
Shell Structures ◽  
Core Shell ◽  
Metal Organic ◽  
Organic Networks

A gold nanoparticle platform enhances the optical properties and order in a metal–organic network (MON).

Highly sensitive and selective detection of trinitrotoluene using cysteine-capped gold nanoparticles

2016 ◽  
Vol 8 (22) ◽  
pp. 4398-4405 ◽  
Author(s):  
S. Devi ◽  
B. Singh ◽  
A. K. Paul ◽  
S. Tyagi
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Cross Linking ◽  
Selective Detection ◽  
Schematic Representation ◽  
Highly Sensitive

(A) A schematic representation of the formation of cysteine capped gold nanoparticles and their interaction at pH 5 and 9.3. (B) A schematic representation of the formation of a Meisenheimer complex between cysteine modified gold nanoparticles and TNT, and possible cross-linking between gold nanoparticles bound to the Meisenheimer complex with gold nanoparticle bound cysteine.

scholarly journals An Overview of the Synthesis of Gold Nanoparticles Using Radiation Technologies

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 939 ◽  
Author(s):  
Lucas Freitas de Freitas ◽  
Gustavo Varca ◽  
Jorge dos Santos Batista ◽  
Ademar Benévolo Lugão
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Gold Nanoparticle ◽  
Reducing Agents ◽  
Single Step ◽  
Nucleation Process ◽  
Size And Shape ◽  
Radiation Sources ◽  
Radiolytic Synthesis

At a nano-level, optical properties of gold are unique and gave birth to an emerging platform of nanogold-based systems for diverse applications, because gold nanoparticle properties are tunable as a function of size and shape. Within the available techniques for the synthesis of gold nanoparticles, the radiolytic synthesis allows proper control of the nucleation process without the need for reducing agents, in a single step, combined or not with simultaneous sterilization. This review details and summarizes the use of radiation technologies for the synthesis and preparation of gold nanoparticles concerning fundamental aspects, mechanism, current pathways for synthesis and radiation sources, as well as briefly outlines final applications and some toxicity aspects related to nanogold-based systems.

In situ hydrosilane reduction and preparation of gold nanoparticle–gel glass composites with nonlinear optical properties

2018 ◽  
Vol 6 (21) ◽  
pp. 5624-5629 ◽  
Author(s):  
Dajiang Yu ◽  
Xingming Sun ◽  
Xin Chen ◽  
Wencan Ma ◽  
Jibin Sun ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Gold Nanoparticle ◽  
Nonlinear Optical ◽  
Optical Limiting ◽  
Nonlinear Optical Properties ◽  
Glass Composites

Gold nanoparticles were reduced in situ by a new hydrosilane reductant in organosilicon oligomer to fabricate nonlinear optical limiting materials.

scholarly journals Gold Nanoparticle Mediated Phototherapy for Cancer

2016 ◽  
Vol 2016 ◽  
pp. 1-29 ◽  
Author(s):  
Cuiping Yao ◽  
Luwei Zhang ◽  
Jing Wang ◽  
Yulu He ◽  
Jing Xin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Radiation Therapy ◽  
Photodynamic Therapy ◽  
Adverse Effects ◽  
Gold Nanoparticle ◽  
Photothermal Therapy ◽  
Drug Carrier ◽  
Cancer Treatments ◽  
Medical Diagnostic

Gold nanoparticles exhibit very unique physiochemical and optical properties, which now are extensively studied in range of medical diagnostic and therapeutic applications. In particular, gold nanoparticles show promise in the advancement of cancer treatments. This review will provide insights into the four different cancer treatments such as photothermal therapy, gold nanoparticle-aided photodynamic therapy, gold nanoparticle-aided radiation therapy, and their use as drug carrier. We also discuss the mechanism of every method and the adverse effects and its limitations.

scholarly journals Glyco-gold nanoparticles: synthesis and applications

2017 ◽  
Vol 13 ◽  
pp. 1008-1021 ◽  
Author(s):  
Federica Compostella ◽  
Olimpia Pitirollo ◽  
Alessandro Silvestri ◽  
Laura Polito
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Biological Activity ◽  
Gold Nanoparticle ◽  
Metallic Core ◽  
Single Entity ◽  
Recent Advances ◽  
Nanoparticles Synthesis ◽  
Nanoparticle Design

Glyco-gold nanoparticles combine in a single entity the peculiar properties of gold nanoparticles with the biological activity of carbohydrates. The result is an exciting nanosystem, able to mimic the natural multivalent presentation of saccharide moieties and to exploit the peculiar optical properties of the metallic core. In this review, we present recent advances on glyco-gold nanoparticle applications in different biological fields, highlighting the key parameters which inspire the glyco nanoparticle design.

scholarly journals Rational screening of biomineralisation peptides for colour-selected one-pot gold nanoparticle syntheses

2019 ◽  
Vol 1 (1) ◽  
pp. 71-75 ◽  
Author(s):  
M. Tanaka ◽  
Y. Takahashi ◽  
L. Roach ◽  
K. Critchley ◽  
S. D. Evans ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Gold Nanoparticle ◽  
Peptide Library ◽  
One Pot ◽  
Binding Peptide ◽  
One Pot Synthesis ◽  
Rational Screening ◽  
The One ◽  
Spotted Array

Biomineralisation peptides that facilitate the one-pot synthesis of gold nanoparticles (AuNPs) with selected optical properties, were screened using a coherent peptide-spotted array consisting of a AuNP binding peptide library.

Recent Advances of Plasmonic Gold Nanoparticles in Optical Sensing and Therapy

2020 ◽  
Vol 25 (46) ◽  
pp. 4861-4876 ◽  
Author(s):  
He Zhou ◽  
Hongwei Yang ◽  
Guangke Wang ◽  
Aijun Gao ◽  
Zhiqin Yuan
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Gold Nanoparticle ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Selective Detection ◽  
Future Trends ◽  
Therapeutic System ◽  
Special Surface

: Gold nanoparticles with special surface plasmon resonance have been widely used in sensing and therapy because of their easy preparation, unique optical properties, excellent biocompatibility, etc. The applications of gold nanoparticles in chemo/biosensing, imaging, and therapy reported in 2016-2019, are summarized in this review. Regarding the gold nanoparticle-based sensing or imaging, sensing mechanisms and strategies are provided to illustrate the concepts for designing sensitive and selective detection platforms. Gold nanoparticlemediated therapy is introduced by surface plasmon resonance-based therapy and delivery-based therapy. Beyond the sole therapeutic system, platforms through synergistic therapy are also discussed. In the end, discussion of the challenges and future trends of gold nanoparticle-based sensing and therapy systems is described.

Interference of Gold Nanoparticles with In vitro Endotoxin Detection Assays

2020 ◽  
Vol 16 (2) ◽  
pp. 204-213 ◽  
Author(s):  
Melissa A. Vetten ◽  
Mary Gulumian
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Surface Reactivity ◽  
In Vitro Assays ◽  
Limulus Amebocyte Lysate ◽  
Chromogenic Assay ◽  
Nanoparticle Suspensions ◽  
Endotoxin Contamination ◽  
Factor C

Background: Endotoxin-free engineered nanoparticle suspensions are imperative for their successful applications in the field of nanomedicine as well as in the investigations in their toxicity. Gold nanoparticles are known to interfere with various in vitro assays due to their optical properties and potential for surface reactivity. In vitro endotoxin testing assays are known to be susceptible to interference caused by the sample being tested. Objective: This study aimed to identify a preferred assay for the testing of endotoxin contamination in gold nanoparticle suspensions. Methods: The interference by gold nanoparticles on three assays namely, the commonly used limulus amebocyte lysate chromogenic assay, the limulus amebocyte lysate gel-clot method, and the less common recombinant Factor C (rFC) assay, was tested. Results: Possible interference could be observed with all three assays. The interference with the absorbance- based chromogenic assay could not be overcome by dilution; whilst the qualitative nature of the gel-clot assay excluded the possibility of distinguishing between a false positive result due to enhancement of the sensitivity of the assay, and genuine endotoxin contamination. However, interference with the rFC assay was easily overcome through dilution. Conclusion: The rFC assay is recommended as an option for endotoxin contamination detection in gold nanoparticle suspensions.

scholarly journals CRISPR/Cas12a-mediated gold nanoparticle aggregation for colorimetric detection of SARS-CoV-2

2021 ◽  
Author(s):  
Yiren Cao ◽  
Jinjun Wu ◽  
Bo Pang ◽  
Hongquan Zhang ◽  
X. Chris Le
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Colorimetric Detection ◽  
Isothermal Amplification ◽  
Nanoparticle Aggregation ◽  
Cleavage Activity ◽  
Gold Nanoparticle Aggregation

The trans-cleavage activity of the target-activated CRISPR-Cas12a liberated an RNA crosslinker from a molecular transducer, which facilitated assembly of gold nanoparticles. Integration of the molecular transducer with isothermal amplification and...

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