Preparation of saline-stable, silica-coated triangular silver nanoplates of use for optical sensing

Brandon, Michael; Ledwith, Deirdre M.; Kelly, John M.

doi:10.1016/j.jcis.2013.10.017

Cited by 51 publications

(50 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Motivated by the high plasmonic potential of Ag NPs, several strategies were suggested to preserve Ag nanostructure from the fast degradation [116]. These strategies mostly focus on surface modification of Ag NPs with an extra protecting layer of inorganic or organic coating, such as Si [117], graphene oxide (GO) [118], self-assembled monolayers of organic thiols [119], etc. Another approach to protect the unstable Ag NPs involves Au coating.…”

Section: Silver Npsmentioning

confidence: 99%

Optically responsive delivery platforms: from the design considerations to biomedical applications

et al. 2020

View full text Add to dashboard Cite

Drug carriers with intelligent functions are powerful therapeutic and diagnostic platforms in curing various diseases such as malignant neoplasms. These functions include the remote noninvasive activation of drug using physical impacts, e.g. light exposure. Combination of different therapeutic modalities (chemotherapy, photodynamic therapy, and so forth) with light-responsive carriers enables promising synergetic effect in tumour treatment. The main goal of this review article is to provide the state of the art on light-sensitive delivery systems with the identification of future directions and their implementation in tumour treatment. In particular, this article reviews the general information on the physical and chemical fundamental mechanisms of interaction between light and carrier systems (e.g. plasmonic and dielectric nanoparticles), the design of optically responsive drug carriers (plain and composite), and the mechanisms of light-driven controlled release of bioactive compounds in biological environment. The special focus is dedicated to the most recent advances in optically responsive bioinspired drug vehicles.

show abstract

Section: Silver Npsmentioning

confidence: 99%

Optically responsive delivery platforms: from the design considerations to biomedical applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Among these nanostructures, silver nanoplates have attracted considerable attention because they could potentially generate maximum electromagnetic field enhancement due to their highly anisotropic structure [12][13][14]. As a result, these particles are ideal for implementation in sensing applications including localized surface plasmon resonance (LSPR) [15][16][17][18], surface-enhanced fluorescence [19], and surface-enhanced Raman scattering (SERS) [20][21][22], which are possibly the most attractive applications.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of High Density of Triangular Silver Nanoplate Films Promoted by 3-Aminopropyltrimethoxysilane

et al. 2015

View full text Add to dashboard Cite

Abstract:In this work, we studied the structure of synthesized triangular silver nanoplates in solution and the growth of the nanoplates on a silicon surface using 3-aminopropyltrimethoxysilane (APTMS) as a coupling agent. The triangular-shaped colloidal silver nanoplates were simply synthesized by a direct chemical reduction approach. We studied the three characteristic peaks of the unique optical absorbance of triangular silver nanoplates and subsequently measured an average edge length of 26 ± 1 nm. The nanoplate thickness was determined to be 7 ± 2 nm from transmission electron microscopy images. Depositing the nanoplates on a silicon surface was carried out to determine the coverage of triangular nanoplates obtained when adhesion was promoted by a coupling agent. The APTMS film assisted the attachment of the nanoplates to the silicon surface and the coverage of the nanoplates increased with increasing deposition time. The triangular silver nanoplate thin film was a monolayer and a high coverage (near complete) was obtained after eight hours of exposure to the nanoplate solution. The silver film formed was shown to be a good surface-enhanced Raman scattering (SERS) substrate as it gave an enormous Raman enhancement for bisphenol A (BPA).

show abstract

“…[16] The resulting electrosteric stabilization facilitates a transfer of metal nanoparticles with sufficiently thick silica coatings into aqueous or organic media and has been shown to efficiently prevent irreversible aggregation, even in liquids with extremely high ionic strengths such as simulated body fluids and typical saline buffers. [17,18] Besides its key importance for biomedical usage, high colloidal stability is also advantageous for applications in nanophotonics and catalysis, as aggregation and eventual fusion of metal nanoparticles is known to induce drastic changes in the plasmonic properties and a significant loss of activity, in particular after high temperature treatments. [19][20][21][22][23] Moreover, the improved mechanical stability imposed by the coating shells can be used to prevent morphological changes during the controlled alloying of bimetallic particles, [24,25] and has been employed to fixate the shape of 3D nanoparticle clusters.…”

Section: Colloidal Chemical and Thermal Stabilizationmentioning

confidence: 99%

Silica‐Coated Plasmonic Metal Nanoparticles in Action

2018

View full text Add to dashboard Cite

Hybrid colloids consisting of noble metal cores and metal oxide shells have been under intense investigation for over two decades and have driven progress in diverse research lines including sensing, medicine, catalysis, and photovoltaics. Consequently, plasmonic core-shell particles have come to play a vital role in a plethora of applications. Here, an overview is provided of recent developments in the design and utilization of the most successful class of such hybrid materials, silica-coated plasmonic metal nanoparticles. Besides summarizing common simple approaches to silica shell growth, special emphasis is put on advanced synthesis routes that either overcome typical limitations of classical methods, such as stability issues and undefined silica porosity, or grant access to particularly sophisticated nanostructures. Hereby, a description is given, how different types of silica can be used to provide noble metal particles with specific functionalities. Finally, applications of such nanocomposites in ultrasensitive analyte detection, theranostics, catalysts, and thin-film solar cells are reviewed.

show abstract

Preparation of saline-stable, silica-coated triangular silver nanoplates of use for optical sensing

Cited by 51 publications

References 70 publications

Optically responsive delivery platforms: from the design considerations to biomedical applications

Optically responsive delivery platforms: from the design considerations to biomedical applications

Self-Assembly of High Density of Triangular Silver Nanoplate Films Promoted by 3-Aminopropyltrimethoxysilane

Silica‐Coated Plasmonic Metal Nanoparticles in Action

Contact Info

Product

Resources

About