The Effect of Electrode Composition on the Composition of Binary Ag/Au Nanoparticles Produced by Spark Ablation
(2021) PHYM01 20211Solid State Physics
Department of Physics
- Abstract
- Synthesis of nanoparticles with high control of the particle composition, high purity and high throughput is of great interest for multiple applications such as catalysis, medicine, energy storage, sensoring, and electronics. As an alternative method to the traditionally used chemical synthesis routes, gas-phase methods have gained attention due to the avoidance of solvents resulting in higher purity of the particles, but also due to the more flexible choice of materials. Spark ablation is a synthesis process that through ablation of two non-insulating electrodes produces high purity nanoparticles in the gas phase with a high control of the composition. Literature indicates that nanoparticles generated with alloyed electrodes obtain the... (More)
- Synthesis of nanoparticles with high control of the particle composition, high purity and high throughput is of great interest for multiple applications such as catalysis, medicine, energy storage, sensoring, and electronics. As an alternative method to the traditionally used chemical synthesis routes, gas-phase methods have gained attention due to the avoidance of solvents resulting in higher purity of the particles, but also due to the more flexible choice of materials. Spark ablation is a synthesis process that through ablation of two non-insulating electrodes produces high purity nanoparticles in the gas phase with a high control of the composition. Literature indicates that nanoparticles generated with alloyed electrodes obtain the same composition as the electrodes, but this has not been sufficiently proved. It is, furthermore, stated that nanoparticles produced with two different electrodes have a larger compositional spread than nanoparticles produced with
alloyed electrodes.
The composition of spark ablated Ag-Au bimetallic nanoparticles produced in 2017 and 2021 using both alloyed (Ag25Au75, Ag50Au50 and Ag75Au25) and two different electrodes (Ag and Au) has been investigated and compared to the electrode composition. The analysis has included both ensemble (SEM-EDS and XRD) and single particle (TEM-EDS and STEM-EDS) characterization methods, the latter essential for comparing the compositional variance of the nanoparticles but often neglected in the literature.
Here, by using single particle analysis in a sensible way in combination with statistical analysis of the results, we have confirmed that particles produced using alloyed electrodes obtain the same composition as the electrodes. We hope that this accomplishment will inspire the field of spark ablation. General strategies for presenting reliable quantitative analysis of individual particles could simplify interpretation and comparison of results with each other, which could assist the development of high performance nanoparticles attractive for industrial applications. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9052775
- author
- Jönsson, Linnéa LU
- supervisor
- organization
- course
- PHYM01 20211
- year
- 2021
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Nanoparticles, Spark Ablation
- language
- English
- id
- 9052775
- date added to LUP
- 2021-06-11 09:24:24
- date last changed
- 2021-06-11 09:24:24
@misc{9052775,
abstract = {{Synthesis of nanoparticles with high control of the particle composition, high purity and high throughput is of great interest for multiple applications such as catalysis, medicine, energy storage, sensoring, and electronics. As an alternative method to the traditionally used chemical synthesis routes, gas-phase methods have gained attention due to the avoidance of solvents resulting in higher purity of the particles, but also due to the more flexible choice of materials. Spark ablation is a synthesis process that through ablation of two non-insulating electrodes produces high purity nanoparticles in the gas phase with a high control of the composition. Literature indicates that nanoparticles generated with alloyed electrodes obtain the same composition as the electrodes, but this has not been sufficiently proved. It is, furthermore, stated that nanoparticles produced with two different electrodes have a larger compositional spread than nanoparticles produced with
alloyed electrodes.
The composition of spark ablated Ag-Au bimetallic nanoparticles produced in 2017 and 2021 using both alloyed (Ag25Au75, Ag50Au50 and Ag75Au25) and two different electrodes (Ag and Au) has been investigated and compared to the electrode composition. The analysis has included both ensemble (SEM-EDS and XRD) and single particle (TEM-EDS and STEM-EDS) characterization methods, the latter essential for comparing the compositional variance of the nanoparticles but often neglected in the literature.
Here, by using single particle analysis in a sensible way in combination with statistical analysis of the results, we have confirmed that particles produced using alloyed electrodes obtain the same composition as the electrodes. We hope that this accomplishment will inspire the field of spark ablation. General strategies for presenting reliable quantitative analysis of individual particles could simplify interpretation and comparison of results with each other, which could assist the development of high performance nanoparticles attractive for industrial applications.}},
author = {{Jönsson, Linnéa}},
language = {{eng}},
note = {{Student Paper}},
title = {{The Effect of Electrode Composition on the Composition of Binary Ag/Au Nanoparticles Produced by Spark Ablation}},
year = {{2021}},
}