scholarly journals Detecting patchy nanoparticle assembly at the single-particle level

Nanoscale ◽  
2017 ◽  
Vol 9 (29) ◽  
pp. 10344-10349 ◽  
Author(s):  
S. Pothorszky ◽  
D. Zámbó ◽  
D. Szekrényes ◽  
Z. Hajnal ◽  
A. Deák
Keyword(s):  
Single Particle ◽  
Optical Scattering ◽  
Nanoparticle Assembly ◽  
Single Particle Level ◽  
Particle Level ◽  
Shed Light ◽  
Individual Objects

In situ optical scattering spectroscopy measurements performed on individual objects shed light on the assembly of patchy nanorods and spheres.

scholarly journals Encapsulated enzymes with integrated fluorescence-control of enzymatic activity

2015 ◽  
Vol 3 (14) ◽  
pp. 2801-2807 ◽  
Author(s):  
Pascal K. Harimech ◽  
Raimo Hartmann ◽  
Joanna Rejman ◽  
Pablo del Pino ◽  
Pilar Rivera-Gil ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Single Particle ◽  
Fluorescence Probes ◽  
Single Particle Level ◽  
Particle Level

Capsules filled with enzymes and fluorescence probes allow in situ enzymatic activity as well as kinetics on a single particle level to be monitored.

scholarly journals Role of Single-Particle Energies in Microscopic Interacting Boson Model Double Beta Decay Calculations

Universe ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 66
Author(s):  
Jenni Kotila
Keyword(s):  
Beta Decay ◽  
Single Particle ◽  
Field Potential ◽  
Double Beta Decay ◽  
Interacting Boson Model ◽  
Model Calculations ◽  
Single Particle Level ◽  
Particle Level ◽  
Boson Model

Single-particle level energies form a significant input in nuclear physics calculations where single-particle degrees of freedom are taken into account, including microscopic interacting boson model investigations. The single-particle energies may be treated as input parameters that are fitted to reach an optimal fit to the data. Alternatively, they can be calculated using a mean field potential, or they can be extracted from available experimental data, as is done in the current study. The role of single-particle level energies in the microscopic interacting boson model calculations is discussed with special emphasis on recent double beta decay calculations.

The influence of diffusion phenomena on catalysis: A study at the single particle level using fluorescence microscopy

2010 ◽  
Vol 157 (1-4) ◽  
pp. 236-242 ◽  
Author(s):  
Gert De Cremer ◽  
Evelyne Bartholomeeusen ◽  
Paolo P. Pescarmona ◽  
Kaifeng Lin ◽  
Dirk E. De Vos ◽  
...  
Keyword(s):  
Fluorescence Microscopy ◽  
Single Particle ◽  
Single Particle Level ◽  
Particle Level ◽  
Diffusion Phenomena

scholarly journals Local Substrate Heterogeneity Influences Electrochemical Activity of TEM Grid-Supported Battery Particles

2021 ◽  
Vol 9 ◽  
Author(s):  
Christina Cashen ◽  
R. Colby Evans ◽  
Zach N. Nilsson ◽  
Justin B. Sambur
Keyword(s):  
Single Particle ◽  
Electrochemical Behavior ◽  
Electrochemical Activity ◽  
Ex Situ ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Single Particle Level ◽  
Particle Level ◽  
Tem Grid ◽  
Ion Insertion

Understanding how particle size and morphology influence ion insertion dynamics is critical for a wide range of electrochemical applications including energy storage and electrochromic smart windows. One strategy to reveal such structure–property relationships is to perform ex situ transmission electron microscopy (TEM) of nanoparticles that have been cycled on TEM grid electrodes. One drawback of this approach is that images of some particles are correlated with the electrochemical response of the entire TEM grid electrode. The lack of one-to-one electrochemical-to-structural information complicates interpretation of genuine structure/property relationships. Developing high-throughput ex situ single particle-level analytical techniques that effectively link electrochemical behavior with structural properties could accelerate the discovery of critical structure-property relationships. Here, using Li-ion insertion in WO3 nanorods as a model system, we demonstrate a correlated optically-detected electrochemistry and TEM technique that measures electrochemical behavior of via many particles simultaneously without having to make electrical contacts to single particles on the TEM grid. This correlated optical-TEM approach can link particle structure with electrochemical behavior at the single particle-level. Our measurements revealed significant electrochemical activity heterogeneity among particles. Single particle activity correlated with distinct local mechanical or electrical properties of the amorphous carbon film of the TEM grid, leading to active and inactive particles. The results are significant for correlated electrochemical/TEM imaging studies that aim to reveal structure-property relationships using single particle-level imaging and ensemble-level electrochemistry.

VALIDITY OF THE BOGOLIUBOV APPROXIMATION FOR THE BOSE-EINSTEIN CONDENSATION IN A TRAP

2012 ◽  
Vol 17 ◽  
pp. 140-148 ◽  
Author(s):  
HIROSHI EZAWA ◽  
KEIJI WATANABE ◽  
KOICHI NAKAMURA
Keyword(s):  
Single Particle ◽  
The State ◽  
Trapping Potential ◽  
Einstein Condensation ◽  
Bose Einstein Condensation ◽  
Single Particle Level ◽  
Bogoliubov Approximation ◽  
Particle Level ◽  
Particle Potential ◽  
Bose Einstein

In treating system of bosons localized in a trapping potential, having a macroscopic number N0 of them condensing at the lowest single-particle level v0, Bogoliubov approximation is to replace the creation/annihilation operators [Formula: see text] of the state v0 by [Formula: see text]. We show that this approximation is justified if the inter-particle potential is repulsive in the sense specified. In fact, we show, by using [Formula: see text], that [Formula: see text] is effectively of the order [Formula: see text] under the condition stated.

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