Ostwald ripening versus single atom trapping: towards understanding platinum particle sintering

2017 ◽  
Vol 19 (45) ◽  
pp. 30513-30519 ◽  
Author(s):  
Xing Wang ◽  
Jeroen A. van Bokhoven ◽  
Dennis Palagin
Keyword(s):  
Ostwald Ripening ◽  
Platinum Particle ◽  
Single Atom ◽  
Atom Trapping ◽  
Mobile Species ◽  
Dispersed Catalysts ◽  
Square Planar

Stepped edge of the CeO2(111) surface effectively traps PtO2 mobile species, generating atomically dispersed catalysts with square-planar [PtO4] structure.

Progress in batch preparation of single-atom catalysts and application in sustainable synthesis of fine chemicals

2021 ◽  
Author(s):  
Yifan Hu ◽  
Hongxuan Li ◽  
Ze-Sheng Li ◽  
Bolin Li ◽  
Shaoyu Wang ◽  
...  
Keyword(s):  
Research Team ◽  
Single Atom ◽  
Fine Chemicals ◽  
Batch Preparation ◽  
Dispersed Catalysts ◽  
The World ◽  
First Time

In 2011, Zhang's research team, in cooperation with Li and Liu, reported the Pt1/FeOx atomically dispersed catalysts for the first time in the world, and based on this, proposed the...

IN-SITU HIGH-TEMPERATURE SCANNING-TUNNELING-MICROSCOPY STUDIES OF TWO-DIMENSIONAL ISLAND-DECAY KINETICS ON ATOMICALLY SMOOTH TiN(001)

2000 ◽  
Vol 07 (05n06) ◽  
pp. 589-593 ◽  
Author(s):  
S. KODAMBAKA ◽  
V. PETROVA ◽  
A. VAILIONIS ◽  
P. DESJARDINS ◽  
D. G. CAHILL ◽  
...  
Keyword(s):  
High Temperature ◽  
Scanning Tunneling Microscopy ◽  
Ostwald Ripening ◽  
Single Atom ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Decay Kinetics ◽  
Tunneling Microscopy ◽  
Temperature Scanning

In-situ high-temperature scanning tunneling microscopy was used to follow the coarsening (Ostwald ripening) and decay kinetics of single and multiple two-dimensional TiN islands on atomically flat TiN (001) terraces and in single-atom deep vacancy pits at temperatures of 750–950°C. The rate-limiting mechanism for island decay was found to be surface diffusion rather than adatom attachment/detachment at island edges. We have modeled island-decay kinetics based upon the Gibbs–Thomson and steady state diffusion equations to obtain a step-edge energy per unit length of 0.23±0.05 eV/Å and an activation energy for adatom formation and diffusion of 3.4±0.3 eV.

scholarly journals Long working distance objective lenses for single atom trapping and imaging

2016 ◽  
Vol 87 (7) ◽  
pp. 073107 ◽  
Author(s):  
J. D. Pritchard ◽  
J. A. Isaacs ◽  
M. Saffman
Keyword(s):  
Single Atom ◽  
Atom Trapping ◽  
Working Distance

scholarly journals Reduction of laser intensity noise over 1 MHz band for single atom trapping

2020 ◽  
Vol 28 (21) ◽  
pp. 31209
Author(s):  
Yu Wang ◽  
Kenneth Wang ◽  
Eliot F. Fenton ◽  
Yen-Wei Lin ◽  
Kang-Kuen Ni ◽  
...  
Keyword(s):  
Laser Intensity ◽  
Single Atom ◽  
Intensity Noise ◽  
Atom Trapping

scholarly journals Characteristics of single-atom trapping in a magneto-optical trap with a high magnetic-field gradient

2007 ◽  
Vol 80 ◽  
pp. 012046 ◽  
Author(s):  
Seokchan Yoon ◽  
Youngwoon Choi ◽  
Sangbum Park ◽  
Wangxi Ji ◽  
Jai-Hyung Lee ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Gradient ◽  
High Magnetic Field ◽  
Magnetic Field Gradient ◽  
Optical Trap ◽  
Single Atom ◽  
Magneto Optical Trap ◽  
Atom Trapping

Following Ostwald ripening in nanoalloys by high-resolution imaging with single-atom chemical sensitivity

2012 ◽  
Vol 101 (12) ◽  
pp. 121920 ◽  
Author(s):  
D. Alloyeau ◽  
T. Oikawa ◽  
J. Nelayah ◽  
G. Wang ◽  
C. Ricolleau
Keyword(s):  
High Resolution ◽  
Ostwald Ripening ◽  
Single Atom ◽  
High Resolution Imaging ◽  
Chemical Sensitivity ◽  
Resolution Imaging

Pt1-O4 as active sites boosting CO oxidation via a non-classical MvK mechanism

2021 ◽  
Author(s):  
Yang Lou ◽  
Yongping Zheng ◽  
Wenyi Guo ◽  
Jingyue Liu
Keyword(s):  
Co Oxidation ◽  
Active Sites ◽  
Total Activity ◽  
Catalytic Reactions ◽  
Single Atom ◽  
Excellent Performance ◽  
Practical Applications ◽  
Square Planar

Single-atom catalysts (SACs) possess excellent performance for various catalytic reactions but it is still challenging to have adequate total activity for practical applications. Here we report the high-valence, square planar...

scholarly journals Fiber-pigtailed optical tweezer for single-atom trapping and single-photon generation

2013 ◽  
Vol 103 (11) ◽  
pp. 114103 ◽  
Author(s):  
S. Garcia ◽  
D. Maxein ◽  
L. Hohmann ◽  
J. Reichel ◽  
R. Long
Keyword(s):  
Single Photon ◽  
Optical Tweezer ◽  
Single Atom ◽  
Atom Trapping ◽  
Photon Generation

Highly Efficient Electroreduction of CO 2 on Nickel Single‐Atom Catalysts: Atom Trapping and Nitrogen Anchoring

Small ◽  
2019 ◽  
Vol 15 (49) ◽  
pp. 1903668 ◽  
Author(s):  
Kaiwen Mou ◽  
Zhipeng Chen ◽  
Xinxin Zhang ◽  
Mingyang Jiao ◽  
Xiangping Zhang ◽  
...  
Keyword(s):  
Single Atom ◽  
Atom Trapping ◽  
Highly Efficient
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