Sintering-Based In-Situ Synthesis and Characterization by TEM of Noble Metal Nanoparticles for Ceramic Glaze Color Control

Gold and silver salt mixtures are incorporated in ceramic glazes for in situ development of mixtures of gold and silver nanoparticles (NPs) that subsequently allow for a wide spectrum of low metal loading color control within ceramic materials. Prior work has shown that gold NPs can be used to create vibrant, color-rich red pigments in high-temperature ceramic and glass applications, though the achievable diameter of the gold NP ultimately limits the available range of color. The current study significantly expands color control from traditional gold nanoparticle red through silver nanoparticle green via the alteration of gold-to-silver salt ratios incorporated in the glaze formulations prior to sintering. Nanoparticle-based coloring systems are tested in both oxidative and reductive firing atmospheres. While the oxidation environment is found to be prohibitive for silver NP stability, the reductive atmosphere is able to form and sustain mixtures of gold and silver NPs across a wide color spectrum. All glazes are analyzed via reflectance spectrometry for color performance and samples are characterized via TEM and EDS for composition and sizing trends. This study creates new groundwork for a color-controlled NP system based on noble metal ratio blends that are both nontoxic and achieved with radically lower metal pigment loading than traditional glazes.

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Complex coloration and antibacterial functionalization of silk fabrics based on noble metal nanoparticles

Journal of Engineered Fibers and Fabrics ◽

10.1177/1558925019866948 ◽

2019 ◽

Vol 14 ◽

pp. 155892501986694 ◽

Cited By ~ 1

Author(s):

Zhanyu Zhang ◽

Xiaodan Lv ◽

Qidan Chen ◽

Jing An

Keyword(s):

Silver Nanoparticles ◽

Metal Nanoparticles ◽

Noble Metal ◽

Fiber Surface ◽

Noble Metal Nanoparticles ◽

Localized Surface Plasmon ◽

Color Strength ◽

Gold And Silver Nanoparticles ◽

Silk Fabrics

Noble metal nanoparticles and traditional dyes jointly colorate silk fabrics. Gold and silver nanoparticles were in situ synthesized on silk fabrics, and the complex coloration was realized by the integration of traditional dyes into the treated silk. The localized surface plasmon resonance properties of gold and silver nanoparticles were not affected by the coloration of dyed-on silk fabrics. The combined optical properties of nanoparticles and dyes extended the color range and enhanced the color strength (K/S) of silk fabrics. Ultraviolet–visible diffuse absorption spectroscopy and scanning electron microscopy demonstrated the in situ synthesis of gold and silver nanoparticles on silk fabrics. The coloration of traditional dyes influenced the morphologies of gold and silver nanoparticles on fiber surface slightly. The silk fabrics with complex coloration showed significant antibacterial property. The complex coloration based on particular nanoparticles and dyes provides a promising strategy to develop multifunctional textiles.

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Current Strategies for Noble Metal Nanoparticle Synthesis

Nanoscale Research Letters ◽

10.1186/s11671-021-03480-8 ◽

2021 ◽

Vol 16 (1) ◽

Author(s):

Giyaullah Habibullah ◽

Jitka Viktorova ◽

Tomas Ruml

Keyword(s):

Noble Metal ◽

Noble Metals ◽

Drug Carriers ◽

Industrial Applications ◽

Metal Nanoparticle ◽

Noble Metal Nanoparticles ◽

Synthesis Methods ◽

Gold And Silver Nanoparticles ◽

Diverse Range ◽

The Past

AbstractNoble metals have played an integral part in human history for centuries; however, their integration with recent advances in nanotechnology and material sciences have provided new research opportunities in both academia and industry, which has resulted in a new array of advanced applications, including medical ones. Noble metal nanoparticles (NMNPs) have been of great importance in the field of biomedicine over the past few decades due to their importance in personalized healthcare and diagnostics. In particular, platinum, gold and silver nanoparticles have achieved the most dominant spot in the list, thanks to a very diverse range of industrial applications, including biomedical ones such as antimicrobial and antiviral agents, diagnostics, drug carriers and imaging probes. In particular, their superior resistance to extreme conditions of corrosion and oxidation is highly appreciated. Notably, in the past two decades there has been a tremendous advancement in the development of new strategies of more cost-effective and robust NMNP synthesis methods that provide materials with highly tunable physicochemical, optical and thermal properties, and biochemical functionalities. As a result, new advanced hybrid NMNPs with polymer, graphene, carbon nanotubes, quantum dots and core–shell systems have been developed with even more enhanced physicochemical characteristics that has led to exceptional diagnostic and therapeutic applications. In this review, we aim to summarize current advances in the synthesis of NMNPs (Au, Ag and Pt).

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3-Glycidoxypropyltrimethoxysilane mediated in situ synthesis of noble metal nanoparticles: Application to hydrogen peroxide sensing

The Analyst ◽

10.1039/c1an15843k ◽

2012 ◽

Vol 137 (2) ◽

pp. 376-385 ◽

Cited By ~ 36

Author(s):

Prem Chandra Pandey ◽

Dheeraj Singh Chauhan

Keyword(s):

Hydrogen Peroxide ◽

Metal Nanoparticles ◽

Noble Metal ◽

In Situ Synthesis ◽

Noble Metal Nanoparticles

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Expression of Concern for “A Recycling-Free Nanocatalyst System: The Stabilization of In Situ-Reduced Noble Metal Nanoparticles on Silicone Nanofilaments via a Mussel-Inspired Approach”

ACS Catalysis ◽

10.1021/acscatal.7b04375 ◽

2018 ◽

Vol 8 (2) ◽

pp. 1212-1212

Author(s):

Xiang Fei ◽

Wangqing Kong ◽

Xin Chen ◽

Xuejiao Jiang ◽

Zhengzhong Shao ◽

...

Keyword(s):

Metal Nanoparticles ◽

Noble Metal ◽

Noble Metal Nanoparticles

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TLC-SERS Plates with a Built-In SERS Layer Consisting of Cap-Shaped Noble Metal Nanoparticles Intended for Environmental Monitoring and Food Safety Assurance

Journal of Nanomaterials ◽

10.1155/2015/316189 ◽

2015 ◽

Vol 2015 ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

H. Takei ◽

J. Saito ◽

K. Kato ◽

H. Vieker ◽

A. Beyer ◽

...

Keyword(s):

Environmental Monitoring ◽

Metal Nanoparticles ◽

Noble Metal ◽

Food Additives ◽

Skim Milk ◽

Chemical Species ◽

Noble Metal Nanoparticles ◽

Surface Enhanced Raman ◽

Mixture Samples

We report on a thin layer chromatograph (TLC) with a built-in surface enhanced Raman scattering (SERS) layer for in-situ identification of chemical species separated by TLC. Our goal is to monitor mixture samples or diluted target molecules suspended in a host material, as happens often in environmental monitoring or detection of food additives. We demonstrate that the TLC-SERS can separate mixture samples and provide in-situ SERS spectra. One sample investigated was a mixture consisting of equal portions of Raman-active chemical species, rhodamine 6 G (R6G), crystal violet (CV), and 1,2-di(4-pyridyl)ethylene (BPE). The three components could be separated and their SERS spectra were obtained from different locations. Another sample was skim milk with a trace amount of melamine. Without development, no characteristic peaks were observed, but after development, a peak was observed at 694 cm−1. Unlike previous TLC-SERS whereby noble metal nanoparticles are added after development of a sample, having a built-in SERS layer greatly facilitates analysis as well as maintaining high uniformity of noble metal nanoparticles.

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Noble Metal Nanoparticles-Based Colorimetric Biosensor for Visual Quantification: A Mini Review

Chemosensors ◽

10.3390/chemosensors7040053 ◽

2019 ◽

Vol 7 (4) ◽

pp. 53 ◽

Cited By ~ 13

Author(s):

Lu Yu ◽

Na Li

Keyword(s):

Metal Nanoparticles ◽

Noble Metal ◽

Electrostatic Interactions ◽

Organic Molecules ◽

Chemical Reduction ◽

Noble Metal Nanoparticles ◽

Gold And Silver Nanoparticles ◽

Local Surface Plasmon Resonance ◽

Reliable Technique ◽

Wide Range

Nobel metal can be used to form a category of nanoparticles, termed noble metal nanoparticles (NMNPs), which are inert (resistant to oxidation/corrosion) and have unique physical and optical properties. NMNPs, particularly gold and silver nanoparticles (AuNPs and AgNPs), are highly accurate and sensitive visual biosensors for the analytical detection of a wide range of inorganic and organic compounds. The interaction between noble metal nanoparticles (NMNPs) and inorganic/organic molecules produces colorimetric shifts that enable the accurate and sensitive detection of toxins, heavy metal ions, nucleic acids, lipids, proteins, antibodies, and other molecules. Hydrogen bonding, electrostatic interactions, and steric effects of inorganic/organic molecules with NMNPs surface can react or displacing capping agents, inducing crosslinking and non-crosslinking, broadening, or shifting local surface plasmon resonance absorption. NMNPs-based biosensors have been widely applied to a series of simple, rapid, and low-cost diagnostic products using colorimetric readout or simple visual assessment. In this mini review, we introduce the concepts and properties of NMNPs with chemical reduction synthesis, tunable optical property, and surface modification technique that benefit the development of NMNPs-based colorimetric biosensors, especially for the visual quantification. The “aggregation strategy” based detection principle of NMNPs colorimetric biosensors with the mechanism of crosslinking and non-crosslinking have been discussed, particularly, the critical coagulation concentration-based salt titration methodology have been exhibited by derived equations to explain non-crosslinking strategy be applied to NMNPs based visual quantification. Among the broad categories of NMNPs based biosensor detection analyses, we typically focused on four types of molecules (melamine, single/double strand DNA, mercury ions, and proteins) with discussion from the standpoint of the interaction between NMNPs surface with molecules, and DNA engineered NMNPs-based biosensor applications. Taken together, NMNPs-based colorimetric biosensors have the potential to serve as a simple yet reliable technique to enable visual quantification.

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