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Mashiyama Y, Hasunuma Y, Fujimori A. Correlation between Chirality and Spherical Particle Formation Related to the Loss of Function of Thixotropic Additive Molecules. ChemistrySelect 2022. [DOI: 10.1002/slct.202200918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yuki Mashiyama
- Graduate School of Science and Engineering Saitama University, 255 Shimo-okubo, Sakura-ku Saitama 338-8570 Japan
| | - Yuka Hasunuma
- Faculty of Engineering Saitama University, 255 Shimo-okubo, Sakura-ku Saitama 338-8570 Japan
| | - Atsuhiro Fujimori
- Graduate School of Science and Engineering Saitama University, 255 Shimo-okubo, Sakura-ku Saitama 338-8570 Japan
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Wang Z, Singaravelu ASS, Dai R, Nian Q, Chawla N, Wang RY. Ligand Crosslinking Boosts Thermal Transport in Colloidal Nanocrystal Solids. Angew Chem Int Ed Engl 2020; 59:9556-9563. [PMID: 32107835 DOI: 10.1002/anie.201916760] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Indexed: 11/06/2022]
Abstract
The ongoing interest in colloidal nanocrystal solids for electronic and photonic devices necessitates that their thermal-transport properties be well understood because heat dissipation frequently limits performance in these devices. Unfortunately, colloidal nanocrystal solids generally possess very low thermal conductivities. This very low thermal conductivity primarily results from the weak van der Waals interaction between the ligands of adjacent nanocrystals. We overcome this thermal-transport bottleneck by crosslinking the ligands to exchange a weak van der Waals interaction with a strong covalent bond. We obtain thermal conductivities of up to 1.7 Wm-1 K-1 that exceed prior reported values by a factor of 4. This improvement is significant because the entire range of prior reported values themselves only span a factor of 4 (i.e., 0.1-0.4 Wm-1 K-1 ). We complement our thermal-conductivity measurements with mechanical nanoindentation measurements that demonstrate ligand crosslinking increases Young's modulus and sound velocity. This increase in sound velocity is a key bridge between mechanical and thermal properties because sound velocity and thermal conductivity are linearly proportional according to kinetic theory. Control experiments with non-crosslinkable ligands, as well as transport modeling, further confirm that ligand crosslinking boosts thermal transport.
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Affiliation(s)
- Zhongyong Wang
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Arun Sundar S Singaravelu
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Rui Dai
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Qiong Nian
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Nikhilesh Chawla
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ, 85281, USA
| | - Robert Y Wang
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ, 85281, USA
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Wang Z, Singaravelu ASS, Dai R, Nian Q, Chawla N, Wang RY. Ligand Crosslinking Boosts Thermal Transport in Colloidal Nanocrystal Solids. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zhongyong Wang
- School for Engineering of Matter, Transport & Energy Arizona State University Tempe AZ 85281 USA
| | | | - Rui Dai
- School for Engineering of Matter, Transport & Energy Arizona State University Tempe AZ 85281 USA
| | - Qiong Nian
- School for Engineering of Matter, Transport & Energy Arizona State University Tempe AZ 85281 USA
| | - Nikhilesh Chawla
- School for Engineering of Matter, Transport & Energy Arizona State University Tempe AZ 85281 USA
| | - Robert Y. Wang
- School for Engineering of Matter, Transport & Energy Arizona State University Tempe AZ 85281 USA
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Roy S, Liu Z, Sun X, Gharib M, Yan H, Huang Y, Megahed S, Schnabel M, Zhu D, Feliu N, Chakraborty I, Sanchez-Cano C, Alkilany AM, Parak WJ. Assembly and Degradation of Inorganic Nanoparticles in Biological Environments. Bioconjug Chem 2019; 30:2751-2762. [DOI: 10.1021/acs.bioconjchem.9b00645] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Sathi Roy
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | - Ziyao Liu
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | - Xing Sun
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | - Mustafa Gharib
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | - Huijie Yan
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | - Yalan Huang
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | - Saad Megahed
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | | | - Dingcheng Zhu
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | - Neus Feliu
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
| | | | | | - Alaaldin M. Alkilany
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
- Department of Pharmaceutics & Pharmaceutical Technology, School of Pharmacy, The University of Jordan, 11931 Amman, Jordan
| | - Wolfgang J. Parak
- Fachbereich Physik, Universität Hamburg, 22607 Hamburg, Germany
- CIC Biomagune, 20014 San Sebastian, Spain
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