Controlled Synthesis of Gold Nanorods via Seeded Growth Approach

2012 ◽  
pp. 61-72
Author(s):  
Teoh Poay Ling ◽  
Khairunisak Abdul Razak ◽  
Azlan Abdul Aziz ◽  
Rahmah Noordin
Keyword(s):  
Gold Nanorods ◽  
Controlled Synthesis ◽  
Seeded Growth ◽  
Growth Approach

Seeded Growth of Single-Crystal Two-Dimensional Covalent Organic Frameworks

2017 ◽  
Author(s):  
Austin M. Evans ◽  
Lucas R. Parent ◽  
Nathan C. Flanders ◽  
Ryan P. Bisbey ◽  
Edon Vitaku ◽  
...  
Keyword(s):  
Molecular Transport ◽  
Controlled Synthesis ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Seeded Growth ◽  
Covalent Bonds ◽  
Crystalline Materials ◽  
Step Procedure ◽  
Structures And Properties ◽  
2D Polymer

<div> <div> <div> <p>Polymerizing monomers into periodic two-dimensional (2D) networks provides structurally precise, atomically thin macromolecular sheets linked by robust, covalent bonds. These materials exhibit desirable mechanical, optoelectrotronic, and molecular transport properties derived from their designed structure and permanent porosity. 2D covalent organic frameworks (COFs) offer broad monomer scope, but are generally isolated as polycrystalline, insoluble powders with limited processability. Here we overcome this limitation by controlling 2D COF formation using a two- step procedure. In the first step, 2D COF nanoparticle seeds are prepared with approximate diameters of 30 nm. Next, monomers are slowly added to suppress new nucleation while promoting epitaxial growth on the existing seeds to sizes of several microns. The resulting COF nanoparticles are of exceptional and unprecedented quality, isolated as single crystalline materials with micron-scale domain sizes. These findings advance the controlled synthesis of 2D layered COFs and will enable a broad exploration of synthetic 2D polymer structures and properties. </p> </div> </div> </div>

Seeded Growth of Single-Crystal Two-Dimensional Covalent Organic Frameworks

2017 ◽  
Author(s):  
Austin M. Evans ◽  
Lucas R. Parent ◽  
Nathan C. Flanders ◽  
Ryan P. Bisbey ◽  
Edon Vitaku ◽  
...  
Keyword(s):  
Molecular Transport ◽  
Controlled Synthesis ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Seeded Growth ◽  
Covalent Bonds ◽  
Crystalline Materials ◽  
Step Procedure ◽  
Structures And Properties ◽  
2D Polymer

<div> <div> <div> <p>Polymerizing monomers into periodic two-dimensional (2D) networks provides structurally precise, atomically thin macromolecular sheets linked by robust, covalent bonds. These materials exhibit desirable mechanical, optoelectrotronic, and molecular transport properties derived from their designed structure and permanent porosity. 2D covalent organic frameworks (COFs) offer broad monomer scope, but are generally isolated as polycrystalline, insoluble powders with limited processability. Here we overcome this limitation by controlling 2D COF formation using a two- step procedure. In the first step, 2D COF nanoparticle seeds are prepared with approximate diameters of 30 nm. Next, monomers are slowly added to suppress new nucleation while promoting epitaxial growth on the existing seeds to sizes of several microns. The resulting COF nanoparticles are of exceptional and unprecedented quality, isolated as single crystalline materials with micron-scale domain sizes. These findings advance the controlled synthesis of 2D layered COFs and will enable a broad exploration of synthetic 2D polymer structures and properties. </p> </div> </div> </div>

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.

CsPbX3/Cs4PbX6 core/shell perovskite nanocrystals

2018 ◽  
Vol 54 (49) ◽  
pp. 6300-6303 ◽  
Author(s):  
Chao Jia ◽  
Hui Li ◽  
Xianwei Meng ◽  
Hongbo Li
Keyword(s):  
Core Shell ◽  
Seeded Growth ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
Growth Approach ◽  
First Time ◽  
Lead Halide

The synthesis of 3D/0D core/shell lead halide perovskite nanocrystals has been realized using the seeded growth approach for the first time.

scholarly journals Size-controlled and water-soluble gold nanoparticles using UV-induced ligand exchange and phase transfer

2018 ◽  
Vol 54 (95) ◽  
pp. 13355-13358 ◽  
Author(s):  
Jan Bart ten Hove ◽  
Laura M. I. Schijven ◽  
Junyou Wang ◽  
Aldrik H. Velders
Keyword(s):  
Gold Nanoparticles ◽  
Ligand Exchange ◽  
Water Solubility ◽  
Phase Transfer ◽  
Water Soluble ◽  
Size Distributions ◽  
Seeded Growth ◽  
Growth Approach ◽  
Size Controlled

Oleylamine-capped gold nanoparticles (AuNPs) with sizes ranging from 5 to 13 nm and narrow size distributions (<10%) are synthesized by using a seeded growth approach. Water-solubility is achieved by using a UV-induced ligand exchange approach.

Kinetically controlled synthesis of bimetallic nanostructures by flowrate manipulation in a continuous flow droplet reactor

2018 ◽  
Vol 3 (4) ◽  
pp. 437-441 ◽  
Author(s):  
Joshua S. Santana ◽  
Kallum M. Koczkur ◽  
Sara E. Skrabalak
Keyword(s):  
Continuous Flow ◽  
Pd Nanoparticles ◽  
Core Shell ◽  
Controlled Synthesis ◽  
Seeded Growth ◽  
Kinetically Controlled ◽  
Bimetallic Nanostructures ◽  
Kinetically Controlled Synthesis

We show that different Au–Pd nanoparticles, ranging from sharp-branched octopods to core@shell octahedra, can be achieved by inline manipulation of reagent flowrates in a microreactor for seeded growth.

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

Synthesis and catalytic properties of highly branched palladium nanostructures using seeded growth

Nanoscale ◽  
2016 ◽  
Vol 8 (5) ◽  
pp. 2867-2874 ◽  
Author(s):  
L. Graham ◽  
G. Collins ◽  
J. D. Holmes ◽  
R. D. Tilley
Keyword(s):  
Catalytic Properties ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Seeded Growth ◽  
Cross Coupling Reactions ◽  
Growth Approach

Branched palladium nanomaterials synthesised using a seeded growth approach for enhanced Suzuki-cross coupling reactions.

Controlled Synthesis of Au Chiral Propellers from Seeded Growth of Au Nanoplates for Chiral Differentiation of Biomolecules

2020 ◽  
Vol 124 (44) ◽  
pp. 24306-24314
Author(s):  
Yongjie Ma ◽  
Zhaozhen Cao ◽  
Jinjie Hao ◽  
Junhao Zhou ◽  
Zhijie Yang ◽  
...  
Keyword(s):  
Controlled Synthesis ◽  
Seeded Growth
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