Surfactant Selective Synthesis of Gold Nanowires by Using a DPPC−Surfactant Mixture as a Capping Agent at Ambient Conditions

2007 ◽  
Vol 111 (16) ◽  
pp. 5932-5940 ◽  
Author(s):  
Mandeep Singh Bakshi ◽  
Gurpreet Kaur ◽  
Pankaj Thakur ◽  
Tarlok Singh Banipal ◽  
Fred Possmayer ◽  
...  
Keyword(s):  
Gold Nanowires ◽  
Selective Synthesis ◽  
Capping Agent ◽  
Surfactant Mixture ◽  
Ambient Conditions

scholarly journals Far-field midinfrared superresolution imaging and spectroscopy of single high aspect ratio gold nanowires

2020 ◽  
Vol 117 (5) ◽  
pp. 2288-2293 ◽  
Author(s):  
Kyle Aleshire ◽  
Ilia M. Pavlovetc ◽  
Robyn Collette ◽  
Xiang-Tian Kong ◽  
Philip D. Rack ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Optical Measurement ◽  
Near Field ◽  
Metal Nanostructures ◽  
Gold Nanowires ◽  
Far Field ◽  
Ambient Conditions ◽  
Fabry Perot ◽  
Imaging And Spectroscopy

Limited approaches exist for imaging and recording spectra of individual nanostructures in the midinfrared region. Here we use infrared photothermal heterodyne imaging (IR-PHI) to interrogate single, high aspect ratio Au nanowires (NWs). Spectra recorded between 2,800 and 4,000 cm−1 for 2.5–3.9-μm-long NWs reveal a series of resonances due to the Fabry–Pérot modes of the NWs. Crucially, IR-PHI images show structure that reflects the spatial distribution of the NW absorption, and allow the resonances to be assigned to the m = 3 and m = 4 Fabry–Pérot modes. This far-field optical measurement has been used to image the mode structure of plasmon resonances in metal nanostructures, and is made possible by the superresolution capabilities of IR-PHI. The linewidths in the NW spectra range from 35 to 75 meV and, in several cases, are significantly below the limiting values predicted by the bulk Au Drude damping parameter. These linewidths imply long dephasing times, and are attributed to reduction in both radiation damping and resistive heating effects in the NWs. Compared to previous imaging studies of NW Fabry–Pérot modes using electron microscopy or near-field optical scanning techniques, IR-PHI experiments are performed under ambient conditions, enabling detailed studies of how the environment affects mid-IR plasmons.

Solvent-controlled selective synthesis of biphenols and quinones via oxidative coupling of phenols

2017 ◽  
Vol 53 (69) ◽  
pp. 9616-9619 ◽  
Author(s):  
Nagnath Yadav More ◽  
Masilamani Jeganmohan
Keyword(s):  
Oxidative Coupling ◽  
Regioselective Synthesis ◽  
Selective Synthesis ◽  
Ambient Conditions

A regioselective synthesis of unsymmetrical and symmetrical biphenols and binaphtholsviaoxidative coupling of phenols or naphthols in the presence of K2S2O8in CF3COOH under ambient conditions is described.

Microplasma-enabled nanocarbon assembly for the diameter-selective synthesis of colloidal graphene quantum dots

2020 ◽  
Vol 56 (71) ◽  
pp. 10365-10368
Author(s):  
Jhih-Siang Yang ◽  
Yi-Chen Chang ◽  
Quan-Hou Huang ◽  
Yu-Ying Lai ◽  
Wei-Hung Chiang
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Selective Synthesis ◽  
Ambient Conditions

A microplasma synthesis of diameter-controlled colloidal graphene quantum dots under ambient conditions is demonstrated.

Single-Step Synthesis of Gold Nanowires Using Biomolecules as Capping Agent/Template: Applications for Tissue Engineering

2013 ◽  
Vol 31 (6) ◽  
pp. 658-662 ◽  
Author(s):  
Anamaria Orza ◽  
Stela Pruneanu ◽  
Olga Soritau ◽  
Gheorghe Borodi ◽  
Adrian Florea ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Single Step ◽  
Gold Nanowires ◽  
Capping Agent

Layer-Selective Synthesis of MoS2 and WS2 Structures under Ambient Conditions for Customized Electronics

ACS Nano ◽  
2020 ◽  
Vol 14 (7) ◽  
pp. 8485-8494 ◽  
Author(s):  
Seoungwoong Park ◽  
Aram Lee ◽  
Kwang-Hun Choi ◽  
Seok-Ki Hyeong ◽  
Sukang Bae ◽  
...  
Keyword(s):  
Selective Synthesis ◽  
Ambient Conditions

scholarly journals The role of dissolution in the synthesis of high-activity organic nanocatalysts in a wet chemical reaction

2017 ◽  
Vol 5 (17) ◽  
pp. 8029-8036 ◽  
Author(s):  
L. J. Liu ◽  
Y. D. Lai ◽  
H. H. Li ◽  
L. T. Kang ◽  
J. J. Liu ◽  
...  
Keyword(s):  
Reaction Time ◽  
High Activity ◽  
Chemical Reaction ◽  
Capping Agent ◽  
Ambient Conditions ◽  
Wet Chemical ◽  
Nucleation Growth

By combining nucleation/growth with dissolution of nanocrystals in a simple wet chemical reaction without capping agent under ambient conditions, a high-activity organic nano-photocatalyst (ZnTPP·H2O) was synthesized by simply adjusting the reaction time.

Dealuminated BEA zeolite for selective synthesis of five-membered cyclic acetal from glycerol under ambient conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (23) ◽  
pp. 18824-18833 ◽  
Author(s):  
N. J. Venkatesha ◽  
Y. S. Bhat ◽  
B. S. Jai Prakash
Keyword(s):  
Selective Synthesis ◽  
Cyclic Acetal ◽  
Ambient Conditions ◽  
Bea Zeolite ◽  
Cyclic Product

BEA zeolite is modified using phenoldisulfonic acid to change catalyst characteristics, which helps to form a single cyclic product. A new term called volume space acidity (VSA) provides volume space available for dioxane to dioxalane rearrangement.

Sulfolane Mediated Highly Selective Synthesis of Mono and Bis-aryl-2-Methyl-6- Fluoro-Indoles and Their Halogenated Synthons

2020 ◽  
Vol 24 (19) ◽  
pp. 2283-2291
Author(s):  
Koppada Masthan Raju ◽  
Ravi Kumar Cheedarala ◽  
Arumugam Pandurangan
Keyword(s):  
Nucleophilic Substitution ◽  
Elevated Temperatures ◽  
Reaction Medium ◽  
Selective Synthesis ◽  
Chemical Transformations ◽  
Ambient Conditions ◽  
Analytical Tools

A simple, efficient, and cheap strategy has been developed for N-arylation of indoles with hexafloro benzene (1) via incorporating sulfolane as an eco-friendly solvent. NMonopentafluoroarylindole (3) at ambient conditions and N, N-bistetrafluoroaryl indole (4) at elevated temperatures were conveniently obtained by simple nucleophilic substitution using NaOH as the base and sulfolane as a reaction medium to obtain in moderately good yields, respectively. Subsequently, 3-chloro, 3-bromo, and 3-iodomono-pentafluoroarylindoles and 3, 3’-dichloro, 3, 3’-dibromo and 3, 3’-diIodobistetrafluoroaryl indoles were prepared in good yields by using respective halogenating reagents and solvents. All the chemical transformations were confirmed by analytical tools such as 1HNMR, FR-IR and HRMS analysis.

Hydrogen bonding in liquid methanol at ambient conditions and at high pressure

2000 ◽  
Vol 98 (3) ◽  
pp. 125-134 ◽  
Author(s):  
T. Weitkamp, J. Neuefeind, H. E. Fisch
Keyword(s):  
High Pressure ◽  
Hydrogen Bonding ◽  
Ambient Conditions
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