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Hou B, Mocanu FC, Cho Y, Lim J, Feng J, Zhang J, Hong J, Pak S, Park JB, Lee YW, Lee J, Kim BS, Morris SM, Sohn JI, Cha S, Kim JM. Evolution of Local Structural Motifs in Colloidal Quantum Dot Semiconductor Nanocrystals Leading to Nanofaceting. NANO LETTERS 2023; 23:2277-2286. [PMID: 36913627 PMCID: PMC10037336 DOI: 10.1021/acs.nanolett.2c04851] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Colloidal nanocrystals (NCs) have shown remarkable promise for optoelectronics, energy harvesting, photonics, and biomedical imaging. In addition to optimizing quantum confinement, the current challenge is to obtain a better understanding of the critical processing steps and their influence on the evolution of structural motifs. Computational simulations and electron microscopy presented in this work show that nanofaceting can occur during nanocrystal synthesis from a Pb-poor environment in a polar solvent. This could explain the curved interfaces and the olivelike-shaped NCs observed experimentally when these conditions are employed. Furthermore, the wettability of the PbS NCs solid film can be further modified via stoichiometry control, which impacts the interface band bending and, therefore, processes such as multiple junction deposition and interparticle epitaxial growth. Our results suggest that nanofaceting in NCs can become an inherent advantage when used to modulate band structures beyond what is traditionally possible in bulk crystals.
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Affiliation(s)
- Bo Hou
- School
of Physics and Astronomy, Cardiff University, Queen’s Building, The Parade, Cardiff, Wales CF24 3AA, United Kingdom
| | - Felix Cosmin Mocanu
- Laboratoire
de Physique de l’École Normale Supérieure, ENS,
Université PSL, CNRS, Sorbonne Université, Université
de Paris, 75005 Paris, France
| | - Yuljae Cho
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
- University
of Michigan−Shanghai Jiao Tong University Joint Institute,
Shanghai Jiao Tong University, 800 Dong Chuan Road, Minghang District, Shanghai 200240, China
| | - Jongchul Lim
- Graduate
school of energy science and technology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Jiangtao Feng
- Department
of Environmental Science & Engineering, School of Energy and Power
Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Jingchao Zhang
- Microsoft
Corporation, Redmond, Washington 98073, United States
| | - John Hong
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
- School of
Materials Science and Engineering, Kookmin
University, Seoul 02707, Republic of Korea
| | - Sangyeon Pak
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
- School
of
Electronic and Electrical Engineering, Hongik
University, Seoul 04066, Republic of Korea
| | - Jong Bae Park
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
| | - Young-Woo Lee
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
| | - Juwon Lee
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
| | - Byung-Sung Kim
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
| | - Stephen M. Morris
- Department
of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United
Kingdom
| | - Jung Inn Sohn
- Division
of Physics and Semiconductor Science, Dongguk
University-Seoul, Seoul 04620, Republic of Korea
| | - SeungNam Cha
- Department
of Physics, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Jong Min Kim
- Department
of Engineering, Electrical Engineering Division, 9 JJ
Thomson Avenue, University of Cambridge, Cambridge CB3 0FA, United Kingdom
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Ahuja V, Bhatt AK, Varjani S, Choi KY, Kim SH, Yang YH, Bhatia SK. Quantum dot synthesis from waste biomass and its applications in energy and bioremediation. CHEMOSPHERE 2022; 293:133564. [PMID: 35007612 DOI: 10.1016/j.chemosphere.2022.133564] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/31/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Quantum dots (QDs) are getting special attention due to their commendable optical properties and applications. Conventional metal-based QDs have toxicity and non-biodegradability issues, thus it becomes necessary to search for renewable precursor molecules for QDs synthesis. In recent years, biomass-based carbon rich QDs (CQDs) have been introduced which are mainly synthesised via carbonization (pyrolysis and hydrothermal treatment). These CQDs offered higher photostability, biocompatibility, low-toxicity, and easy tunability for physicochemical properties. Exceptional optical properties become a point of attraction for its multifaceted applications in various sectors like fabrication of electrodes and solar cells, conversion of solar energy to electricity, detection of pollutants, designing biosensors, etc. In recent years, a lot of work has been done in this field. This article will summarize these advancements along in a special context to biomass-based QDs and their applications in energy and the environment.
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Affiliation(s)
- Vishal Ahuja
- Department of Biotechnology, Himachal Pradesh University, Shimla, 171005, India
| | - Arvind Kumar Bhatt
- Department of Biotechnology, Himachal Pradesh University, Shimla, 171005, India
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, 382010, Gujarat, India
| | - Kwon-Young Choi
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea
| | - Sang-Hyoun Kim
- School of Civil and Environmental Engineering, Yonsei University, Seoul, 03722, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea; Institute for Ubiquitous Information Technology and Applications, Seoul, 05029, Republic of Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea; Institute for Ubiquitous Information Technology and Applications, Seoul, 05029, Republic of Korea.
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