Article
Chemistry, Physical
Mikelis Marnauza, Robin Sjokvist, Sebastian Lehmann, Kimberly A. A. Dick
Summary: Environmental transmission electron microscopy is used to study the growth of Au nanoparticle seeded GaSb nanowires in situ. It is found that the precursor V/III ratio affects the morphology, composition, and diameter of the nanowires. The observed trends can be reproduced in a conventional exsitu system, highlighting the transferability and importance of the results obtained in situ.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Energy & Fuels
A. Amin, R. Huang, D. Newbrook, V Sethi, S. Yong, S. Beeby, I Nandhakumar
Summary: We report a facile two-step synthesis method for bismuth telluride nanowires and demonstrate for the first time the suitability of a N-methyl-2-pyrrolidone/polyvinylidene fluoride solvent/binder paste for screen printing nanowires, with potential for flexible thermoelectric material fabrication. The annealed and screen printed bi2Te3/PVDF NW composites showed excellent thermoelectric performance and flexibility.
JOURNAL OF PHYSICS-ENERGY
(2022)
Article
Chemistry, Physical
J. Andzane, A. Felsharuk, A. Sarakovskis, U. Malinovskis, E. Kauranens, M. Bechelany, K. A. Niherysh, I. V. Komissarov, D. Erts
Summary: This work presents a simple and cost-effective physical vapor deposition method for producing high-quality Bi2Se3 and Sb2Te3 ultrathin films on various substrates. The synthesized ultrathin films exhibit interesting thermoelectric properties at specific thicknesses, comparable to those grown by molecular beam epitaxy method. Performance of the best ultrathin films is tested in a prototype of a thermoelectric generator.
MATERIALS TODAY ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Felix Hansen, Rico Fucke, Titouan Charvin, Samuel Froeschke, Daniel Wolf, Romain Giraud, Joseph Dufouleur, Nico Graessler, Bernd Buechner, Peer Schmidt, Silke Hampel
Summary: This study proposes a method for the synthesis of mixed crystals of bismuth and antimony tellurides, which belong to the V2VI3 material family. The ideal synthesis conditions were determined through thermodynamic calculations and optimization experiments. The synthesized nanosheets exhibit high crystallinity and quality, with a significantly reduced carrier density compared to the binary compounds.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Rizwan Akram, Jan Sher Khan, Zahid Qamar, Saima Rafique, Mozaffar Hussain, Farrukh Bashir Kayani
Summary: Polyvinylpyrrolidone (PVP)-assisted bismuth telluride (Bi2Te3) fibers were synthesized by electrospinning technique, and compacted at a constant temperature. The compacted fibers showed improved thermoelectric performance and optical properties.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Kinga Lasek, Jingfeng Li, Mahdi Ghorbani-Asl, Salma Khatun, Onyedikachi Alanwoko, Vimukthi Pathirage, Arkady V. Krasheninnikov, Matthias Batzill
Summary: The study shows that monolayer PtTe2 can be transformed into the metal Pt2Te2 by reacting with vapor-deposited Pt atoms. The transformation occurs by nucleating the Pt2Te2 phase within PtTe2 islands, forming a metal-semiconductor junction. The alignment of the Fermi levels of the metal and the p-doped PtTe2 is achieved by an interface dipole that accommodates the difference in the work functions of the two materials.
Article
Chemistry, Physical
Kwangsik Jeong, Dambi Park, Inhee Maeng, Dajung Kim, Hoedon Kwon, Chul Kang, Mann-Ho Cho
Summary: This study focused on transforming the native oxide layer on Bi2Te3 from TeO2 to Bi2O3 by changing the annealing temperature, and investigated the effects of the interface between the oxide layers and Bi2Te3 nanowire. The change in the band-alignment and charge states of defects at the interface significantly modulates the carrier dynamics, affecting the photoresponse of TIs and providing insights for TI-related photodetector devices. Additionally, a method for controlling surface oxidation and interface properties to directly impact TI-based photodetector devices operation was proposed.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Aicha S. Lemine, Osama Fayyaz, R. A. Shakoor, Zubair Ahmad, Jolly Bhadra, Noora J. Al-Thani
Summary: This study investigates the electrochemical responses of cold and hot compacted, microwave-sintered p- and n-type BiTe alloys in a saline medium. The corrosion behavior of hot-compacted p-type and cold-compacted n-type BiTe alloys was enhanced. The study proposes a corrosion resistance mechanism and fits the experimental data with an equivalent electrical circuit.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
K. P. Mithun, Srabani Kar, Abinash Kumar, D. V. S. Muthu, N. Ravishankar, A. K. Sood
Summary: Collective excitation of Dirac plasmons in graphene and topological insulators has led to tunable plasmonic materials. Using OPTP spectroscopy, plasmonic oscillations in bismuth telluride nanowires were demonstrated, showing a Lorentzian response with a resonance frequency shifting with photogenerated carrier density. Modulation depth was found to be tunable by pump fluence, and the time evolution of the system represented a long relaxation channel lasting for more than 50 ps. Model of the decay dynamics highlighted contributions from surface recombination and trap mediated relaxation channels.
Article
Nanoscience & Nanotechnology
Ling Li, Ningqiang Shi, Xiangqian Jiang, Weiping Chen, Chuncheng Ban, Jiandong Hao
Summary: This study focuses on the synthesis of high-quality bismuth telluride (Bi2Te3) nanowires and boron nitride nanotubes (BNNTs), as well as the preparation of Bi2Te3-BNNTs and Bi2Te3-BCNNTs composite films. The obtained composite films exhibit high electrical conductivity, good flexibility, and thermal stability. They show great potential for application in thermoelectric conversion.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Minsu Kim, Dabin Park, Jooheon Kim
Summary: In this study, the morphology of Cu3SbSe4 particles was controlled using the shape of Se, resulting in improved thermoelectric performance.
DALTON TRANSACTIONS
(2022)
Review
Engineering, Electrical & Electronic
Qihao Zhang, Kangfa Deng, Lennart Wilkens, Heiko Reith, Kornelius Nielsch
Summary: This review examines the development of micro-thermoelectric devices, exploring progress in device design, integration, and performance, as well as the potential applications of the technology in cooling, power generation, and sensing. These devices offer faster response time, higher resolution, and greater power density compared to their commercial counterparts, making them crucial for highly integrated electronic devices, the Internet of Things, and flexible and wearable technology.
NATURE ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Farah M. El-Makaty, Muddasir Nawaz, R. A. Shakoor, Abdelmagid Hammuda, Khaled M. Youssef
Summary: Corrosion behavior of three different bismuth telluride alloys were examined, and it was found that the n-type sample formed a passive layer, showing higher corrosion resistance compared to the other two samples.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Multidisciplinary
Zhi Zhang, Zhaozheng Wang, Yunkang Chen, Yuan Feng, Sicheng Dong, Han Zhou, Zhong Lin Wang, Chi Zhang
Summary: This study reports a semiconductor direct-current triboelectric nanogenerator (SDC-TENG) based on the tribovoltaic effect, which is capable of ultrahigh-power generation. By using gallium nitride (GaN) and bismuth telluride (Bi2Te3), this SDC-TENG achieves a peak open-circuit voltage of 40 V and a power density approximately 200 times higher than previous generators.
ADVANCED MATERIALS
(2022)
Article
Electrochemistry
Rasin Ahmed, Md Golam Rosul, Yin Xu, Mona Zebarjadi, Giovanni Zangari
Summary: The polymorphism of Bi2Se3 allows for tunability in its electrical, thermal, and optical properties. By fabricating a mixture of orthorhombic and rhombohedral structures, materials engineering can optimize the properties of Bi2Se3. The thickness-dependent Seebeck effect in Bi2Se3 films is related to the transition from pure rhombohedral to a mixture of orthorhombic and rhombohedral phases.
ELECTROCHIMICA ACTA
(2021)