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Micromachines
Special Issues
Nanowires for Novel Technological Applications
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Special Issue "Nanowires for Novel Technological Applications"

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D：Materials and Processing".

Deadline for manuscript submissions: 30 November 2023 | Viewed by 1619

Special Issue Editors

Dr. Arun Kumar

E-Mail Website
Guest Editor
Department of Physics “E.R. Caianiello”, University of Salerno, 84084 Fisciano, Italy
Interests: MOCVD; synthesis of nanowires; optoelectronic properties of nanostructured materials; non-volatile memories; photodetectors; solar cells; Raman spectroscopy
Prof. Dr. Antonio Di Bartolomeo

E-Mail Website
Guest Editor
Department of Physics “E.R. Caianiello”, University of Salerno, 84084 Fisciano, Italy
Interests: optical and electrical properties of nanostructured materials such as carbon nanotubes, graphene, and 2D materials; van der Waals heterostructures and Schottky junctions; field-effect transistors; non-volatile memories; solar cells; photodetectors; field emission devices
Special Issues, Collections and Topics in MDPI journals
Dr. Valeria Demontis

E-Mail Website
Guest Editor
NEST Laboratory, Scuola Normale Superiore and Instituto Nanoscienze-CNR, 56126 Pisa, Italy
Interests: semiconductor nanowire electronics; quantum transport in nanoscale devices; nanofabrication; thermoelectricity; solar cells; sensors

Special Issue Information

Dear Colleagues,

Nanowires (NWs) are high-aspect-ratio nanostructures, with typical lengths of a few micrometres and diameters below 100 nm. Due to their quasi-one-dimensional geometry, NWs exhibit exceptional structural, morphological, optical, electrical, thermal, and magnetic properties, which go well beyond those of their bulk counterparts and envision them as very promising materials in a wide range of next-generation technological applications. NWs are not only attractive as potential building blocks of novel functional devices but also represent ideal platforms for exploring many fundamental physical phenomena at the nanoscale. One of the unique advantages of epitaxially grown NWs is the remarkable strain tolerance, which enables the growth of defect-free heterostructures, even in the presence of a large lattice mismatch between different materials. Extensive research has indeed been devoted to the realisation of a variety of interesting axial and radial heterostructures, which allow to combine the peculiar properties of one-dimensional nanoengineered systems with the flexibility and tailoring opportunities offered by the integration of different materials. The main objective of this Special Issue of Micromachines is to present relevant and recent insights on nanowires applications in the fields of photodetectors, memories, nanogenerators, solar cells, light-emitting diodes, lasers, energy conversion and storage, biomedicine, and quantum technologies. We invite authors to submit original communications, articles, or reviews on innovative technological applications of the NWs.

Dr. Arun Kumar
Prof. Dr. Antonio Bartolomeo
Dr. Valeria Demontis
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanowires
  • heterostructures
  • core-shell nanowires
  • memories
  • sensors
  • photodetectors
  • field-effect transistors
  • optoelectronic devices
  • nanogenerators
  • integrated circuits
  • photovoltaics
  • LEDs
  • lasers

Published Papers (2 papers)

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Article
Design of Photonic Crystal Biosensors for Cancer Cell Detection
by
Yang Yang
,
Yang Xiang
and
Xubin Qi
Micromachines 2023, 14(7), 1478; https://doi.org/10.3390/mi14071478 - 23 Jul 2023
Viewed by 643
Abstract
A photonic crystal biosensor is a compact device fabricated from photonic crystal materials, which enables the detection and monitoring of the presence and concentration changes of biological molecules or chemical substances. In this paper, we propose a biosensor for cancer cell detection based [...] Read more.
A photonic crystal biosensor is a compact device fabricated from photonic crystal materials, which enables the detection and monitoring of the presence and concentration changes of biological molecules or chemical substances. In this paper, we propose a biosensor for cancer cell detection based on a silicon photonic crystal with a hexagonal resonant cavity introduced in a triangular lattice array. One of the bandgap ranges of this structure is 1188 nm≤λ≤1968 nm. When the incident light wavelength is within the range of 1188 nm≤λ≤1968 nm, the transmission coefficient of this structure at the resonant wavelength of 1469.58 nm is found to reach 99.62% through the finite difference time domain method, with a quality factor of 980. Subsequently, a biosensor is designed from this structure, with its sensing mechanism relying on the change in refractive index leading to a shift in the resonant wavelength. The target sample can be identified by observing the shift in the resonant wavelength. As cancer cells and normal cells possess different refractive indices, this biosensor can be used for their detection. The maximum sensitivity of the sensor is 915.75 nm/RIU and the minimum detection limit is 0.000236 RIU. Full article
(This article belongs to the Special Issue Nanowires for Novel Technological Applications)
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Article
Piezotronic and Piezo-Phototronic Effects-Enhanced Core–Shell Structure-Based Nanowire Field-Effect Transistors
by
Xiang Liu
,
Fangpei Li
,
Wenbo Peng
,
Quanzhe Zhu
,
Yangshan Li
,
Guodong Zheng
,
Hongyang Tian
and
Yongning He
Micromachines 2023, 14(7), 1335; https://doi.org/10.3390/mi14071335 - 29 Jun 2023
Viewed by 476
Abstract
Piezotronic and piezo-phototronic effects have been extensively applied to modulate the performance of advanced electronics and optoelectronics. In this study, to systematically investigate the piezotronic and piezo-phototronic effects in field-effect transistors (FETs), a core–shell structure-based Si/ZnO nanowire heterojunction FET (HJFET) model was established [...] Read more.
Piezotronic and piezo-phototronic effects have been extensively applied to modulate the performance of advanced electronics and optoelectronics. In this study, to systematically investigate the piezotronic and piezo-phototronic effects in field-effect transistors (FETs), a core–shell structure-based Si/ZnO nanowire heterojunction FET (HJFET) model was established using the finite element method. We performed a sweep analysis of several parameters of the model. The results show that the channel current increases with the channel radial thickness and channel doping concentration, while it decreases with the channel length, gate doping concentration, and gate voltage. Under a tensile strain of 0.39‰, the saturation current change rate can reach 38%. Finally, another core–shell structure-based ZnO/Si nanowire HJFET model with the same parameters was established. The simulation results show that at a compressive strain of −0.39‰, the saturation current change rate is about 18%, which is smaller than that of the Si/ZnO case. Piezoelectric potential and photogenerated electromotive force jointly regulate the carrier distribution in the channel, change the width of the channel depletion layer and the channel conductivity, and thus regulate the channel current. The research results provide a certain degree of reference for the subsequent experimental design of Zn-based HJFETs and are applicable to other kinds of FETs. Full article
(This article belongs to the Special Issue Nanowires for Novel Technological Applications)
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