Aspect ratio controlled synthesis of gold nanorods

2003 ◽  
Vol 20 (6) ◽  
pp. 1145-1148 ◽  
Author(s):  
Sung Koo Kang ◽  
Soonwoo Chah ◽  
Chang Yeon Yun ◽  
Jongheop Yi
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
Controlled Synthesis

Aspect-ratio-controlled synthesis of high-aspect-ratio gold nanorods in high-yield

2009 ◽  
Vol 9 (2) ◽  
pp. e140-e143 ◽  
Author(s):  
Won Min Park ◽  
Yun Suk Huh ◽  
Won Hi Hong
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
High Aspect Ratio ◽  
High Yield ◽  
Controlled Synthesis

Effect of aspect ratio on the chirality of gold nanorods prepared through conventional seed-mediated growth method

2021 ◽  
Vol 1152 ◽  
pp. 338277
Author(s):  
Xiaojuan Zhou ◽  
Qiang Liu ◽  
Xiaoyu Shi ◽  
Chunli Xu ◽  
Baoxin Li
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
Growth Method ◽  
Seed Mediated

scholarly journals Gold Nanorods for Light-Based Lung Cancer Theranostics

2018 ◽  
Vol 19 (11) ◽  
pp. 3318 ◽  
Author(s):  
Oscar Knights ◽  
James McLaughlan
Keyword(s):  
Gold Nanorods ◽  
Photothermal Therapy ◽  
Continuous Wave ◽  
Low Cost ◽  
Laser System ◽  
Controlled Synthesis ◽  
Surface Plasmon Resonances ◽  
Plasmon Resonances ◽  
Theranostic Applications ◽  
Cancer Theranostics

Gold nanorods (AuNRs) have the potential to be used in photoacoustic (PA) imaging and plasmonic photothermal therapy (PPTT) due to their unique optical properties, biocompatibility, controlled synthesis, and tuneable surface plasmon resonances (SPRs). Conventionally, continuous-wave (CW) lasers are used in PPTT partly due to their small size and low cost. However, if pulsed-wave (PW) lasers could be used to destroy tissue then combined theranostic applications, such as PA-guided PPTT, would be possible using the same laser system and AuNRs. In this study, we present the effects of AuNR size on PA response, PW-PPTT efficacy, and PA imaging in a tissue-mimicking phantom, as a necessary step in the development of AuNRs towards clinical use. At equivalent NP/mL, the PA signal intensity scaled with AuNR size, indicating that overall mass has an effect on PA response, and reinforcing the importance of efficient tumour targeting. Under PW illumination, all AuNRs showed toxicity at a laser fluence below the maximum permissible exposure to skin, with a maximum of 80% cell-death exhibited by the smallest AuNRs, strengthening the feasibility of PW-PPTT. The theranostic potential of PW lasers combined with AuNRs has been demonstrated for application in the lung.

Peptide Controlled Assembly of Palladium Nanoparticles on High-Aspect-Ratio Gold Nanorods

2020 ◽  
Vol 124 (50) ◽  
pp. 27743-27753
Author(s):  
John Tyler Wagner ◽  
Analeece K. Long ◽  
Michael B. Sumner ◽  
Ivan Cockman ◽  
Marvin Smith ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
High Aspect Ratio ◽  
Palladium Nanoparticles ◽  
Controlled Assembly

Controlling second harmonic generation of gold nanorods: Surface area matters more than aspect ratio

2020 ◽  
Vol 741 ◽  
pp. 137112
Author(s):  
Mrigank S. Verma ◽  
Manish Kumar ◽  
Manabendra Chandra
Keyword(s):  
Aspect Ratio ◽  
Second Harmonic Generation ◽  
Surface Area ◽  
Harmonic Generation ◽  
Gold Nanorods ◽  
Second Harmonic

Seedless synthesis of high aspect ratio gold nanorods with high yield

2014 ◽  
Vol 2 (10) ◽  
pp. 3528 ◽  
Author(s):  
Xiaolong Xu ◽  
Yuanyuan Zhao ◽  
Xiangdong Xue ◽  
Shuaidong Huo ◽  
Fei Chen ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
High Aspect Ratio ◽  
High Yield

scholarly journals Investigation on the Effect of Centrifugation Speed on the Shape Separation of Gold Nanorods

2018 ◽  
Vol 7 (4.30) ◽  
pp. 330 ◽  
Author(s):  
Caessandra Addine Minun ◽  
Nur Zehan An’Nisa ◽  
Marlia Morsin ◽  
Nur Liyana Razali ◽  
Suratun Nafisah ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
Localized Surface Plasmon Resonance ◽  
Crystal Orientation ◽  
Surface Density ◽  
Morphological Analysis ◽  
Localized Surface Plasmon ◽  
Plasmon Peak ◽  
Sensing Material ◽  
Growth Method

High-quality gold nanorods (AuNRs) with a uniform aspect ratio and sizes are crucial for applications in biomedical or sensor industry. AuNRs is implementing Localized Surface Plasmon Resonance (LSPR) as sensing method which is highly dependent on the size, separation of nanoparticles, aspect ratio and the shape of the nanoparticles. Thus, in this process, the shape, surface density and aspect ratio of AuNRs were investigated to be used further as LSPR sensing material. The AuNRs was prepared using Seed Mediated Growth Method (SMGM) and the growth solution of the AuNRs was centrifuged with the speed ranging from 2500 rpm to 5000 rpm to separate the particles shaper prior to deposition as thin film. The XRD result shows the peak at 2θ = 38º which shows the (111) crystal orientation of the AuNRs. There are also two distinct peaks formed at the absorption spectra graph obtained from the UV-Vis result which associated with transverse plasmon peak (t-LSPR) and longitudinal plasmon peak (l-LSPR). The t-LSPR peak is significantly smaller than the l-LSPR and located in the wavelength ranges from 500 nm to 560 nm whereas the l-LSPR of the AuNRs shows a stronger and a higher peak which is located in the wavelength ranges from 700 nm to 780 nm. The morphological analysis using FESEM shows that the higher centrifugation speed separates the AuNRs with higher aspect ratio and higher surface density.

High Aspect Ratio Hydroxyapatite Nanorods Formed by Polymer Assisted Synthesis

2014 ◽  
Vol 508 ◽  
pp. 52-55
Author(s):  
A. Joseph Nathanael ◽  
R. Yuvakkumar ◽  
Tae Hwan Oh ◽  
Sun Ig Hong
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Morphological Analysis ◽  
Polymer Concentration ◽  
Xrd Analysis ◽  
Controlled Synthesis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Length Width ◽  
Size Controlled

High aspect ratio (length/width) of hydroxyapatite (HA) nanorods were prepared by polymer assisted hydrothermal synthesis. The aspect ratio of the nanorods was increased in the presence of polymer in hydrothermal method. Structural analysis was carried out by X-ray diffraction (XRD) analysis to find the purity and the crystal structure of the material. Morphological analysis was carried out by field emission scanning electron microscope (FESEM) to find the morphological variation in the presence of polymer concentration compared to pristine HA. The increased aspect ratio of the HA was visible from the morphological analysis. This shape and size controlled synthesis have an important impact in many field of research.

Ultrathin Te Nanowires: An Excellent Platform for Controlled Synthesis of Ultrathin Platinum and Palladium Nanowires/Nanotubes with Very High Aspect Ratio

2009 ◽  
Vol 21 (18) ◽  
pp. 1850-1854 ◽  
Author(s):  
Hai-Wei Liang ◽  
Shuo Liu ◽  
Jun-Yan Gong ◽  
Shang-Bing Wang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Controlled Synthesis ◽  
Palladium Nanowires ◽  
Very High

scholarly journals Two-step synthesis of high aspect ratio gold nanorods

2006 ◽  
Vol 4 (1) ◽  
pp. 160-165 ◽  
Author(s):  
Tom Mortier ◽  
André Persoons ◽  
Thierry Verbiest
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
High Aspect Ratio ◽  
Cetyltrimethylammonium Bromide ◽  
Surfactant Concentration ◽  
Synthetic Method ◽  
Aspect Ratios ◽  
Seed Mediated

AbstractWe describe a very simple, two-step synthetic method to prepare gold nanorods with extremely high aspect ratios (> 20) and average lengths of more than 1000 nm. The method is based on a seed-mediated growth in presence of the surfactant cetyltrimethylammonium bromide. The length and aspect ratios of the nanorods can be manipulated by varying the surfactant concentration.

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