Journal ArticleDOI
pH-controlled reversible assembly of peptide-functionalized gold nanoparticles.
Satyabrata Si,Tarun K. Mandal +1 more
Reads0
Chats0
TLDR
The assembly/disassembly process of carboxylated peptide-functionalized gold nanoparticles (peptide-GNPs) was studied and resulted from the intermolecular H-bonding between two carboxylic acid groups of peptides bound to the two adjacent GNPs and were confirmed by FTIR spectroscopy.Abstract:
The assembly/disassembly process of carboxylated peptide-functionalized gold nanoparticles (peptide-GNPs) was studied within the pH interval of 2.5 to 10. The assembly process was not well controlled at pH 2.5, leading to the formation of 3D structures of GNPs, whereas at pH 4 we observed controlled assembly with the formation of only a network of 1D chains. In the pH range of 2.5 to 4, the assembly proceeded with the formation of a combination of two extremes (i.e., having both 1D and 2D nanostructures). The assembly process was reversed on changing the pH of the medium to 10. The assembly/disassembly process was monitored using UV−vis spectroscopy and finally confirmed by TEM analysis. This assembly resulted from the intermolecular H-bonding between two carboxylic acid groups of peptides bound to the two adjacent GNPs and were confirmed by FTIR spectroscopy.read more
Citations
More filters
Journal ArticleDOI
Label-Free Colorimetric Detection of Lead Ions with a Nanomolar Detection Limit and Tunable Dynamic Range by using Gold Nanoparticles and DNAzyme
Zidong Wang,Jung Heon Lee,Yi Lu +2 more
Journal ArticleDOI
Synthesis, characterization and catalytic activity of gold nanoparticles biosynthesized with Rhizopus oryzae protein extract
TL;DR: In this article, a simple one-pot green chemical method for the biosynthesis of gold nanoparticles by reducing chloroauric acid (HAuCl4) with protein extract of Rhizopus oryzae to produce novel gold nano-bio-conjugates (AuNBCs) was described.
Journal ArticleDOI
Enhanced retention and cellular uptake of nanoparticles in tumors by controlling their aggregation behavior.
TL;DR: The results suggest that controlled aggregation of NPs sensitive to tumor microenvironment can serve as a universal strategy to enhance the retention and cellular uptake of inorganic NPs in tumors, and modifying NPs with a mixed-charge zwitterionic surface can provide an easy way to obtain stealth properties and pH-sensitivity at the same time.
Journal ArticleDOI
Colorimetric Response of Peptide‐Functionalized Gold Nanoparticles to Metal Ions
TL;DR: The potential of peptide-functionalized gold nanoparticles (PFNs) as a colorimetric sensor for metal ions is demonstrated.
Journal ArticleDOI
Surface ligands in synthesis, modification, assembly and biomedical applications of nanoparticles
TL;DR: This review will thoroughly consider the ligand design for the various steps of nanodevelopment, from synthesis and assembly through biomedical translation.
References
More filters
Journal ArticleDOI
Selective Colorimetric Detection of Polynucleotides Based on the Distance-Dependent Optical Properties of Gold Nanoparticles
TL;DR: A highly selective, colorimetric polynucleotide detection method based on mercaptoalkyloligonucleotide-modified gold nanoparticle probes is reported, which can detect about 10 femtomoles of an oligonucleotide.
PatentDOI
Self-assembly and mineralization of peptide-amphiphile nanofibers
TL;DR: In this paper, pH-induced self-assembly of a peptide-amphiphile was used to make a nanostructured fibrous scaffold reminiscent of extracellular matrix.
Journal ArticleDOI
Nanoparticle arrays on surfaces for electronic, optical, and sensor applications.
TL;DR: This review addresses the research that has led to numerous sensing, electronic, optoelectronic, and photoelectronic interfaces, and also takes time to cover the synthesis and characterization of nanoparticles and nanoparticle arrays.
Journal ArticleDOI
Shape and size dependence of radiative, non-radiative and photothermal properties of gold nanocrystals
Stephan Link,Mostafa A. El-Sayed +1 more
TL;DR: In this article, the physical origin of surface plasmon absorption in gold nanoparticles with emphasis on the Mie and also the Maxwell-Garnett theory is discussed. And the effects of particle size and shape on the resonance condition are reviewed.
Journal ArticleDOI
One‐Dimensional Assemblies of Nanoparticles: Preparation, Properties, and Promise
Zhiyong Tang,Nicholas A. Kotov +1 more
TL;DR: In this paper, the authors present a systemic review of current research on 1D Nanoparticle (NP) assemblies, including their preparation methods and novel characteristics of NP chains, such as collective properties and directional transfer of photons, electrons, spins, etc.