Growth Mechanism of Gold Nanorods

2013 ◽  
Vol 25 (4) ◽  
pp. 555-563 ◽  
Author(s):  
Kyoungweon Park ◽  
Lawrence F. Drummy ◽  
Robert C. Wadams ◽  
Hilmar Koerner ◽  
Dhriti Nepal ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods

Growth Mechanism of Gold Nanorods in Binary Surfactant System

2016 ◽  
Vol 37 (6) ◽  
pp. 931-937 ◽  
Author(s):  
Bo-Mi Kim ◽  
Sun-Hwa Seo ◽  
Ara Joe ◽  
Kyu-Dong Shim ◽  
Eue-Soon Jang
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods ◽  
Surfactant System

Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth Method

2003 ◽  
Vol 15 (10) ◽  
pp. 1957-1962 ◽  
Author(s):  
Babak Nikoobakht ◽  
Mostafa A. El-Sayed
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods ◽  
Growth Method ◽  
Seed Mediated

Controlling Length of Gold Nanorods and Monitoring Their Growth Mechanism Using X-ray Absorption Spectroscopy

2006 ◽  
Vol 921 ◽  
Author(s):  
Ru-Shi Liu ◽  
H. M. Chen ◽  
S. F. Hu
Keyword(s):  
Ascorbic Acid ◽  
Fine Structure ◽  
Absorption Spectroscopy ◽  
Growth Mechanism ◽  
Gold Nanorods ◽  
New Approach ◽  
Growth Solution ◽  
X Ray ◽  
Aspect Ratios ◽  
X Ray Absorption

AbstractA new approach to fabricate long length of gold nanorods by controlling the volume of growth solution will be reported. The shape evolutions ranging from fusiform nanoparticles to 1-D rods was observed. Increasing the addition of growth solution can control the length of nanorods. The length of rods can be extended to 2 £gm, and nanorods with aspect ratios of up to ~ 70 could be obtained. Moreover, X-ray absorption spectroscopy (XAS) is applied herein to elucidate the growth mechanism of gold nanorods. The gold ions were directly reduced to gold atoms by ascorbic acid during the reaction, and then gold atoms were deposited on the surface of gold seeds that were introduced into the reaction. Extended X-ray absorption fine structure (EXAFS) confirmed the growth of gold and the environment around Au atoms over the reaction. The XAS are expected to have wide applications in the growth of gold and other related materials.

Shape and size transformation of gold nanorods (GNRs) via oxidation process: A reverse growth mechanism

2011 ◽  
Vol 257 (9) ◽  
pp. 4175-4179 ◽  
Author(s):  
Govindasamy Chandrasekar ◽  
Karine Mougin ◽  
Hamidou Haidara ◽  
Loïc Vidal ◽  
Enrico Gnecco
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods ◽  
Oxidation Process ◽  
Shape And Size

Montmorillonite Dendrites

1974 ◽  
Vol 32 ◽  
pp. 454-455
Author(s):  
Necip Güven ◽  
Rodney W. Pease
Keyword(s):  
Crystal Growth ◽  
Growth Mechanism ◽  
Growth Front ◽  
Morphological Features ◽  
Dendritic Crystal ◽  
Crystal Growth Mechanism

Morphological features of montmorillonite aggregates in a large number of samples suggest that they may be formed by a dendritic crystal growth mechanism (i.e., tree-like growth by branching of a growth front).

Structural phenomena in the growth of carbon nanotubes

1993 ◽  
Vol 51 ◽  
pp. 750-751
Author(s):  
Jun Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Growth Mechanism ◽  
Carbonaceous Material ◽  
Cluster Growth ◽  
Structural Elements ◽  
Rich Variety ◽  
Different Shapes ◽  
Point To Point

HREM studies of the carbonaceous material deposited on the cathode of a Huffman-Krätschmer arc reactor have shown a rich variety of multiple-walled nano-clusters of different shapes and forms. The preparation of the samples, as well as the variety of cluster shapes, including triangular, rhombohedral and pentagonal projections, are described elsewhere.The close registry imposed on the nanotubes, focuses attention on the cluster growth mechanism. The strict parallelism in the graphitic separation of the tube walls is maintained through changes of form and size, often leading to 180° turns, and accommodating neighboring clusters and defects. Iijima et. al. have proposed a growth scheme in terms of pentagonal and heptagonal defects and their combinations in a hexagonal graphitic matrix, the first bending the surface inward, and the second outward. We report here HREM observations that support Iijima’s suggestions, and add some new features that refine the interpretation of the growth mechanism. The structural elements of our observations are briefly summarized in the following four micrographs, taken in a Hitachi H-8100 TEM operating at an accelerating voltage of 200 kV and with a point-to-point resolution of 0.20 nm.

Synthesis, performance and growth mechanism of silver nanoparticle coated SERS fiber probe

2019 ◽  
Vol 107 (3) ◽  
pp. 305
Author(s):  
Mengmei Geng ◽  
Yuting Long ◽  
Tongqing Liu ◽  
Zijuan Du ◽  
Hong Li ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectrum ◽  
Reaction Time ◽  
Growth Mechanism ◽  
Fiber Optic ◽  
Fiber Optic Probe ◽  
Visible Absorption ◽  
Fiber Probe ◽  
Surface Enhanced Raman ◽  
Optic Probe

Surface-enhanced Raman Scattering (SERS) fiber probe provides abundant interaction area between light and materials, permits detection within limited space and is especially useful for remote or in situ detection. A silver decorated SERS fiber optic probe was prepared by hydrothermal method. This method manages to accomplish the growth of silver nanoparticles and its adherence on fiber optic tip within one step, simplifying the synthetic procedure. The effects of reaction time on phase composition, surface plasmon resonance property and morphology were investigated by X-ray diffraction analysis (XRD), ultraviolet-visible absorption spectrum (UV-VIS absorption spectrum) and scanning electron microscope (SEM). The results showed that when reaction time is prolonged from 4–8 hours at 180 °C, crystals size and size distribution of silver nanoparticles increase. Furthermore, the morphology, crystal size and distribution density of silver nanoparticles evolve along with reaction time. A growth mechanism based on two factors, equilibrium between nucleation and growth, and the existence of PVP, is hypothesized. The SERS fiber probe can detect rhodamin 6G (R6G) at the concentration of 10−6 M. This SERS fiber probe exhibits promising potential in organic dye and pesticide residue detection.

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