Journal ArticleDOI
Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth Method
TLDR
In this article, a method was used for preparing gold NRs with aspect ratios ranging from 1.5 to 4.5 for which the surface plasmon absorption maxima are between 600 and 1300 nm.Abstract:
A method is used for preparing gold NRs with aspect ratios ranging from 1.5 to 10 for which the surface plasmon absorption maxima are between 600 and 1300 nm. This method has been adapted from a previously published seed-mediated growth method (Jana et al. Adv. Mater. 2001, 13, 1389). The disadvantages and limitations of the earlier method (i.e., formation of noncylindrical NRs, φ-shaped particles, and formation of a large fraction of spherical particles) have been overcome by use of a hexadecyltrimethylammonium bromide (CTAB)-capped seed instead of a citrate-capped one. In a single-component surfactant system, the silver content of the growth solution was used to grow NRs to a desired length. This results in reproducible formation of NRs with aspect ratios ranging from 1.5 to 4.5. To grow longer NRs with aspect ratios ranging from 4.6 to 10, a binary surfactant mixture composed of benzyldimethylhexadecylammoniumchloride (BDAC) and CTAB was used. NRs are grown in this mixture either by aging or by additio...read more
Citations
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Journal ArticleDOI
Biosensing with plasmonic nanosensors
TL;DR: This paper introduces the localized surface plasmon resonance (LSPR) sensor and describes how its exquisite sensitivity to size, shape and environment can be harnessed to detect molecular binding events and changes in molecular conformation.
Journal ArticleDOI
Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?
TL;DR: A comprehensive review of current research activities that center on the shape-controlled synthesis of metal nanocrystals, including a brief introduction to nucleation and growth within the context of metal Nanocrystal synthesis, followed by a discussion of the possible shapes that aMetal nanocrystal might take under different conditions.
Journal ArticleDOI
Noble Metals on the Nanoscale: Optical and Photothermal Properties and Some Applications in Imaging, Sensing, Biology, and Medicine
TL;DR: How the unique tunability of the plasmon resonance properties of metal nanoparticles through variation of their size, shape, composition, and medium allows chemists to design nanostructures geared for specific bio-applications is emphasized.
Journal ArticleDOI
Anisotropic metal nanoparticles: Synthesis, assembly, and optical applications
Catherine J. Murphy,Tapan K. Sau,Anand Gole,Christopher J. Orendorff,Jinxin Gao,Linfeng Gou,Simona E. Hunyadi,Tan Li +7 more
TL;DR: Variations in reaction conditions and crystallographic analysis of gold nanorod have led to insight into the growth mechanism of these materials, and optical applications in sensing and imaging, which take advantage of the visible light absorption and scattering properties of the nanorods are discussed.
Journal ArticleDOI
The golden age: gold nanoparticles for biomedicine
TL;DR: It is argued that gold nanotechnology-enabled biomedicine is not simply an act of 'gilding the (nanomedicinal) lily', but that a new 'Golden Age' of biomedical nanotechnology is truly upon us.
References
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Journal ArticleDOI
Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering
Shuming Nie,Steven R. Emory +1 more
TL;DR: In this article, surface-enhanced Raman scattering was used to detect single molecules and single nanoparticles at room temperature with the use of surface enhanced Raman, and the intrinsic Raman enhancement factors were on the order of 10 14 to 10 15, much larger than the ensemble-averaged values derived from conventional measurements.
Journal ArticleDOI
Synthesis of thiol-derivatised gold nanoparticles in a two-phase liquid-liquid system
TL;DR: Using two-phase reduction of AuCl4 by sodium borohydride in the presence of an alkanethiol, solutions of 1-3 nm gold particles bearing a surface coating of thiol have been prepared and characterised; this novel material can be handled as a simple chemical compound as mentioned in this paper.
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A DNA-based Method for Rationally Assembling Nanoparticles Into Macroscopic Materials
TL;DR: A method for assembling colloidal gold nanoparticles rationally and reversibly into macroscopic aggregates by using the specificity of DNA interactions to direct the interactions between particles of different size and composition is described.
Journal ArticleDOI
Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices
TL;DR: Thermal annealing converts the internal particle structure from a chemically disordered face- centered cubic phase to the chemically ordered face-centered tetragonal phase and transforms the nanoparticle superlattices into ferromagnetic nanocrystal assemblies that can support high-density magnetization reversal transitions.
Journal ArticleDOI
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals
TL;DR: In this paper, the present status and new opportunities for research in this area of materials physical chemistry are reviewed, as well as a review of the present state and opportunities in this field.