We present direct visualization of the dynamics of oleic-acid-capped PbTe nanoparticles suspended in different organic solvents using liquid cell transmission electron microscopy. Liquid cell transmission electron microscopy is a powerful tool to directly observe the behavior of a variety of nanoparticles in liquids, but requires careful consideration and quantification of how the electron beam affects the systems being investigated. We find that etching and dissolution of PbTe nanoparticles occurs with a strong dependence on electron dose rate ranging from no perceivable effect on the nanoparticles with lower dose rates (50 e- Å-2 s-1) to complete dissolution within seconds or minutes at higher dose rates (100 and 200 e- Å-2 s-1). We propose that oxidative etching, resulting from the radiolysis of small amounts of water, causes the PbTe nanoparticles to dissolve after exposure to a threshold electron dose rate of 50 e- Å-2 s-1.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c9nr04646a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Paclitaxel-loaded ROS-responsive nanoparticles for head and neck cancer therapy.
Drug Deliv
December 2023
School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
High intracellular reactive oxygen species (ROS) level is characteristic of cancer cells and could act as a target for the efficient targeted drug delivery for cancer treatment. Consequently, biomaterials that react to excessive levels of ROS are essential for biomedical applications. In this study, a novel ROS-responsive polymer based on D-α-Tocopheryl polyethylene glycol 1000 succinate (TPGS) and poly (β-thioester) (TPGS-PBTE) was synthesized for targeted delivery of the first-line antineoplastic drug, paclitaxel (PTX).
View Article and Find Full Text PDFAchieving higher thermoelectric performance of n-type PbTe by adjusting the band structure and enhanced phonon scattering.
Nanoscale
December 2022
Key Lab of Photovoltaic and Energy Conservation Materials, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, P. R. China.
Due to the very distinct electronic band structure and lower power factor, the exploration of n-type PbTe as thermoelectric materials has historically fallen behind that of p-type PbTe. In this work, n-type PbSbTe-based composites incorporated with CuSbS nanoparticles are synthesized and investigated. Sb doping is utilized to modify its carrier concentration in order to obtain n-type PbTe materials with a high power factor.
View Article and Find Full Text PDFCorrection: Nanoarchitectonics of p-type BiSbTe with improved figure of merit introducing PbTe nanoparticles.
RSC Adv
November 2021
College of Electronic and Information, Qingdao University Qingdao 266071 China
[This corrects the article DOI: 10.1039/D1RA07138F.].
View Article and Find Full Text PDFNanoarchitectonics of p-type BiSbTe with improved figure of merit introducing PbTe nanoparticles.
RSC Adv
November 2021
College of Electronic and Information Engineering, Qingdao University Qingdao 266071 China
BiSbTe (BST) is known to be a unique p-type commercial thermoelectric (TE) alloy used at room temperatures, but its figure of merit () is relatively low for wide industrial applications. To improve its value is vitally important. Here, we show that the incorporation of 0.
View Article and Find Full Text PDFInvestigation of the Phase Transition at the Surface of Thermoelectric PbTe with van der Waals Control.
Research (Wash D C)
March 2022
Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China.
The structure of thermoelectric materials largely determines the thermoelectric characteristics. Hence, a better understanding of the details of the structural transformation process/conditions can open doors for new applications. In this study, the structural transformation of PbTe (a typical thermoelectric material) is studied at the atomic scale, and both nucleation and growth are analyzed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!