1
|
Tang X, Song A, Wu H, Feng K, Shao T, Ma T. Observing and Modeling the Wear Process of Heterogeneous Interface. NANO LETTERS 2024; 24:6965-6973. [PMID: 38814470 DOI: 10.1021/acs.nanolett.4c01290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Understanding and controlling the wear process of heterogeneous interfaces between soft and hard phases is crucial for designing and fabricating materials, such as improving the wear resistance of particle reinforced metal matrix composites and the accuracy and efficiency of chemical mechanical polishing. However, the wear process can be hardly observed, as interfaces are buried under the surface. Here, we proposed a nanowear test method by combining focused ion beam cutting to expose interfaces, atomic force microscopy to rub against interfaces, and scanning electron microscope to characterize the interface damage. Using this method, three typical wear forms had been observed in Al/SiC composite, i.e., merely matrix wear, particle fracture, and particle pullout. A theoretical model was proposed that revealed that the increasing interfacial friction would induce particle fracture or pullout, depending on the particle edge angle and tip edge angle. This work sheds light on wear control in composites and nanofabrication.
Collapse
Affiliation(s)
- Xin Tang
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Aisheng Song
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Haijun Wu
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
- Sino-Platinum Metals Co., Ltd., Wuhua District, Kunming, Yunnan 650221, China
| | - Kaili Feng
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Tianmin Shao
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Tianbao Ma
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| |
Collapse
|
2
|
Shein K, Zharkova E, Kashchenko M, Kolbatova A, Lyubchak A, Elesin L, Nguyen E, Semenov A, Charaev I, Schilling A, Goltsman G, Novoselov KS, Gayduchenko I, Bandurin DA. Fundamental Limits of Few-Layer NbSe 2 Microbolometers at Terahertz Frequencies. NANO LETTERS 2024; 24:2282-2288. [PMID: 38345381 DOI: 10.1021/acs.nanolett.3c04493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
The rapid development of infrared spectroscopy, observational astronomy, and scanning near-field microscopy has been enabled by the emergence of sensitive mid- and far-infrared photodetectors. Superconducting hot-electron bolometers (HEBs), known for their exceptional signal-to-noise ratio and fast photoresponse, play a crucial role in these applications. While superconducting HEBs are traditionally crafted from sputtered thin films such as NbN, the potential of layered van der Waals (vdW) superconductors is untapped at THz frequencies. Here, we introduce superconducting HEBs made from few-layer NbSe2 microwires. By improving the interface between NbSe2 and metal leads, we overcome impedance mismatch with RF readout, enabling large responsivity THz detection (0.13 to 2.5 THz) with a minimal noise equivalent power of 7 pW/ H z and nanosecond-range response time. Our work highlights NbSe2 as a promising platform for HEB technology and presents a reliable vdW assembly protocol for custom bolometer production.
Collapse
Affiliation(s)
- Kirill Shein
- Moscow Pedagogical State University, Moscow, Russia 119991
- National Research University Higher School of Economics, Moscow, Russia 101000
| | - Ekaterina Zharkova
- Programmable Functional Materials Lab, Center for Neurophysics and Neuromorphic Technologies, Moscow, Russia 127495
| | - Mikhail Kashchenko
- Programmable Functional Materials Lab, Center for Neurophysics and Neuromorphic Technologies, Moscow, Russia 127495
| | - Anna Kolbatova
- Moscow Pedagogical State University, Moscow, Russia 119991
| | - Anastasia Lyubchak
- Moscow Pedagogical State University, Moscow, Russia 119991
- National Research University Higher School of Economics, Moscow, Russia 101000
| | - Leonid Elesin
- Programmable Functional Materials Lab, Center for Neurophysics and Neuromorphic Technologies, Moscow, Russia 127495
- Institute for Functional Intelligent Materials, National University of Singapore, Singapore 117575
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575
| | - Ekaterina Nguyen
- Programmable Functional Materials Lab, Center for Neurophysics and Neuromorphic Technologies, Moscow, Russia 127495
| | | | | | | | - Gregory Goltsman
- Moscow Pedagogical State University, Moscow, Russia 119991
- National Research University Higher School of Economics, Moscow, Russia 101000
| | - Kostya S Novoselov
- Institute for Functional Intelligent Materials, National University of Singapore, Singapore 117575
| | - Igor Gayduchenko
- Moscow Pedagogical State University, Moscow, Russia 119991
- National Research University Higher School of Economics, Moscow, Russia 101000
| | - Denis A Bandurin
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575
| |
Collapse
|