Size-Dependent Catalytic Activity and Dynamics of Gold Nanoparticles at the Single-Molecule Level

2010 ◽  
Vol 132 (1) ◽  
pp. 138-146 ◽  
Author(s):  
Xiaochun Zhou ◽  
Weilin Xu ◽  
Guokun Liu ◽  
Debashis Panda ◽  
Peng Chen
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Single Molecule ◽  
Single Molecule Level ◽  
Size Dependent

A stochastic theoretical approach to study the size-dependent catalytic activity of a metal nanoparticle at the single molecule level

2017 ◽  
Vol 19 (13) ◽  
pp. 8889-8895 ◽  
Author(s):  
Divya Singh ◽  
Srabanti Chaudhury
Keyword(s):  
Catalytic Activity ◽  
Single Molecule ◽  
Time Distribution ◽  
First Passage Time ◽  
Theoretical Method ◽  
Passage Time ◽  
Metal Nanoparticle ◽  
First Passage ◽  
Single Molecule Level ◽  
Size Dependent

We present a theoretical method based on the first passage time distribution formalism to study the size-dependent catalytic activity of metal nanoparticle at the single molecule level.

Size-Dependent Catalytic Activity of Gold Nanoparticles in DNA Hydrogels

2015 ◽  
Vol 358 (1) ◽  
pp. 106-111 ◽  
Author(s):  
Anatoly Zinchenko ◽  
Shota Taniguchi ◽  
Shizuaki Murata
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Size Dependent ◽  
Dna Hydrogels

scholarly journals Single-molecule imaging of telomerase reverse transcriptase in human telomerase holoenzyme and minimal RNP complexes

eLife ◽  
2015 ◽  
Vol 4 ◽  
Author(s):  
Robert Alexander Wu ◽  
Yavuz S Dagdas ◽  
S Tunc Yilmaz ◽  
Ahmet Yildiz ◽  
Kathleen Collins
Keyword(s):  
Catalytic Activity ◽  
Reverse Transcriptase ◽  
Single Molecule ◽  
Cell Extract ◽  
Telomerase Reverse Transcriptase ◽  
Single Molecule Imaging ◽  
Purification Method ◽  
Single Molecule Level ◽  
Synthesis Properties ◽  
Human Telomerase

Telomerase synthesizes chromosome-capping telomeric repeats using an active site in telomerase reverse transcriptase (TERT) and an integral RNA subunit template. The fundamental question of whether human telomerase catalytic activity requires cooperation across two TERT subunits remains under debate. In this study, we describe new approaches of subunit labeling for single-molecule imaging, applied to determine the TERT content of complexes assembled in cells or cell extract. Surprisingly, telomerase reconstitutions yielded heterogeneous DNA-bound TERT monomer and dimer complexes in relative amounts that varied with assembly and purification method. Among the complexes, cellular holoenzyme and minimal recombinant enzyme monomeric for TERT had catalytic activity. Dimerization was suppressed by removing a TERT domain linker with atypical sequence bias, which did not inhibit cellular or minimal enzyme assembly or activity. Overall, this work defines human telomerase DNA binding and synthesis properties at single-molecule level and establishes conserved telomerase subunit architecture from single-celled organisms to humans.

scholarly journals Size controlled green synthesis of gold nanoparticles using Coffea arabica seed extract and their catalytic performance in 4-nitrophenol reduction

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 24819-24826 ◽  
Author(s):  
N. K. R. Bogireddy ◽  
U. Pal ◽  
L. Martinez Gomez ◽  
V. Agarwal
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Green Synthesis ◽  
Coffea Arabica ◽  
Room Temperature ◽  
Catalytic Performance ◽  
Seed Extract ◽  
Size Dependent ◽  
Nitrophenol Reduction ◽  
Size Controlled

Size dependent catalytic activity of AuNPs synthesized at room temperature from Coffea arabica seed extract.

Size dependent catalytic activities of green synthesized gold nanoparticles and electro-catalytic oxidation of catechol on gold nanoparticles modified electrode

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 99364-99377 ◽  
Author(s):  
Aftab Ahmad ◽  
Yun Wei ◽  
Fatima Syed ◽  
Muhammad Imran ◽  
Zia Ul Haq Khan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Modified Electrode ◽  
Catalytic Activities ◽  
Size Dependent ◽  
Electro Catalytic Oxidation

A green and facile method for the synthesis of gold nanoparticles with efficient catalytic activity.

scholarly journals Plasmon-assisted Förster resonance energy transfer at the single-molecule level in the moderate quenching regime

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7674-7681 ◽  
Author(s):  
J. Bohlen ◽  
Á. Cuartero-González ◽  
E. Pibiri ◽  
D. Ruhlandt ◽  
A. I. Fernández-Domínguez ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Energy Transfer ◽  
Single Molecule ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Dna Origami ◽  
Forster Resonance Energy Transfer ◽  
Förster Resonance Energy Transfer ◽  
Single Molecule Level ◽  
Förster Resonance

A single molecule “acceptor bleaching” technique is employed to study the effect of gold nanoparticles on FRET using DNA origami templates.

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