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Input of Moldova in shaping modern electrochemical science and technology. J Solid State Electrochem 2023. [DOI: 10.1007/s10008-023-05428-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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Cheng Y, Luo Y, Shen R, Kong D, Zhou W. Testing and Analysis Method of Low Remanence Materials for Magnetic Shielding Device. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16020681. [PMID: 36676419 PMCID: PMC9862833 DOI: 10.3390/ma16020681] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/03/2023] [Accepted: 01/05/2023] [Indexed: 06/12/2023]
Abstract
Magnetic shielding devices with a grid structure of multiple layers of highly magnetically permeable materials (such as permalloy) can achieve remanent magnetic fields at the nanotesla (nT) level or even lower. The remanence of the material inside the magnetic shield, such as the building materials used in the support structure, can cause serious damage to the internal remanence of the magnetic shield. Therefore, it is of great significance to detect the remanence of the materials used inside the magnetic shielding device. The existing test methods do not limit the test environment, the test process is vulnerable to additional magnetic field interference and did not consider the real results of the material in the weak magnetic environment. In this paper, a novel method of measuring the remanence of materials in a magnetic shielding cylinder is proposed, which prevents the interference of the earth's magnetic field and reduces the measurement error. This method is used to test concrete components, composite materials and metal materials commonly applicated in magnetic shielding devices and determine the materials that can be used for magnetic shielding devices with 1 nT, 10 nT and 100 nT as residual magnetic field targets.
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Affiliation(s)
- Yuan Cheng
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China
- China United Engineering Co., Ltd., Hangzhou 310022, China
| | - Yaozhi Luo
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China
| | - Ruihong Shen
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China
- China United Engineering Co., Ltd., Hangzhou 310022, China
| | - Deyu Kong
- College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Weiyong Zhou
- School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China
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Moise CC, Mihai GV, Anicăi L, Monaico EV, Ursaki VV, Enăchescu M, Tiginyanu IM. Electrochemical Deposition of Ferromagnetic Ni Nanoparticles in InP Nanotemplates Fabricated by Anodic Etching Using Environmentally Friendly Electrolyte. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3787. [PMID: 36364561 PMCID: PMC9656686 DOI: 10.3390/nano12213787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Porous InP templates possessing a thickness of up to 100 µm and uniformly distributed porosity were prepared by anodic etching of InP substrates exhibiting different electrical conductivities, involving an environmentally friendly electrolyte. Ni nanoparticles were successfully directly deposited by pulsed electroplating into prefabricated InP templates without any additional deposition of intermediary layers. The parameters of electrodeposition, including the pulse amplitude, pulse width and interval between pulses, were optimized to reach a uniform metal deposition covering the inner surface of the nanopores. The electrochemical dissolution of n-InP single crystals was investigated by measuring the current-voltage dependences, while the Ni-decorated n-InP templates have been characterized by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The proposed technology is expected to be of interest for sensing and photocatalytic applications, as well as for the exploration of their plasmonic and magnetic properties.
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Affiliation(s)
- Călin Constantin Moise
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- S.C. NanoPRO START MC S.R.L., Mitropolit Antim Ivireanu Street 40, 110310 Pitesti, Romania
| | - Geanina Valentina Mihai
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Liana Anicăi
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
| | - Eduard V. Monaico
- National Center for Materials Study and Testing, Technical University of Moldova, Bd. Stefan cel Mare 168, 2004 Chisinau, Moldova
| | - Veaceslav V. Ursaki
- National Center for Materials Study and Testing, Technical University of Moldova, Bd. Stefan cel Mare 168, 2004 Chisinau, Moldova
- Academy of Sciences of Moldova, 2001 Chisinau, Moldova
| | - Marius Enăchescu
- Center for Surface Science and Nanotechnology, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania
- Academy of Romanian Scientists, 54 Splaiul Independentei, 050094 Bucharest, Romania
| | - Ion M. Tiginyanu
- National Center for Materials Study and Testing, Technical University of Moldova, Bd. Stefan cel Mare 168, 2004 Chisinau, Moldova
- Academy of Sciences of Moldova, 2001 Chisinau, Moldova
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