Cutting‐Edge Nanomaterials for Electronics in Asia: Synthesis, Properties, and Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: closed (20 May 2022) | Viewed by 29862

Special Issue Editors


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Guest Editor
Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita 564-8680, Japan
Interests: metal nanoclusters; metal nanoparticles; carbon dots; nanocomposite; nanoink; photocatalysis; chemical sensing; printed/flexible electronics; SALDI-MS

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Guest Editor
School of Electronics and Information Technology (School of Microelectronics), Sun Yat-sen University, Guangzhou 510006, China
Interests: polaritonics; nanophotonics; tehrahertz sciences and technologies; mid-infrared spectroscopy; two-dimensional materials and their optoelectronics
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Special Issue Information

Dear Colleagues,

Recent nanomaterials innovation in electronics has been based on the synthesis/fabrication of new nanomaterials, properties with the size and shape, and nano-scale characterization. The enormous variety of nanomaterials for electronic device systems have progressed immensely, and their range of properties and applications appears to be almost endless. Recent printing technologies offer direct deposition of conductive nanomaterials on flexible substrates for cost-effective/large scale fabrication. The printed electronics provide widespread flexible electronics and, more recently, stretchable/soft electronics such as sensors, electronic displays, solar cells, thin-film transistors, and supercapacitors. The studies of nanomaterials in electronics are at the forefront of scientific and industrial applications.  

This Special issue is going to be focused on “Cutting‐Edge Nanomaterials for Electronics in Asia: Synthesis, Properties, and Applications”. Advanced nanomaterials for electronics are especially welcome, including 0D nanomaterials (nanoparticles, nanodots, quantum dots), 1D nanomaterials (nanotube, nanofibers, nanowires), 2D nanomaterials (graphene, other 2D layered nanomaterials), organic conducting polymers, liquid metals, and these composite nanomaterials. Rapidly growing applications are also welcome, such as printed/flexible/stretchable electronics, energy storage, optoelectronics, power electronics, bioelectronics, and sensors for medical and healthcare.

Prof. HIdeya Kawasaki
Prof. Dr. Huanjun Chen
Guest Editors

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Keywords

  • Conductive nanomaterials
  • Composite nanomaterials
  • Flexible/stretchable electronics
  • Power electronics
  • Energy harvesting and storage
  • Light-emitting diodes
  • Optoelectronics
  • Nanophotonics
  • Bioelectronics
  • Sensors and detectors

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Published Papers (6 papers)

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Research

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13 pages, 3299 KiB  
Article
Self-Assembly Vertical Graphene-Based MoO3 Nanosheets for High Performance Supercapacitors
by Ao Cheng, Yan Shen, Tianzeng Hong, Runze Zhan, Enzi Chen, Zengrui Chen, Guowang Chen, Muyuan Liang, Xin Sun, Donghang Wang, Linchen Xu, Yu Zhang and Shaozhi Deng
Nanomaterials 2022, 12(12), 2057; https://doi.org/10.3390/nano12122057 - 15 Jun 2022
Cited by 6 | Viewed by 2352
Abstract
Supercapacitors have been extensively studied due to their advantages of fast-charging and discharging, high-power density, long-cycling life, low cost, etc. Exploring novel nanomaterial schemes for high-performance electrode materials is of great significance. Herein, a strategy to combine vertical graphene (VG) with MoO3 [...] Read more.
Supercapacitors have been extensively studied due to their advantages of fast-charging and discharging, high-power density, long-cycling life, low cost, etc. Exploring novel nanomaterial schemes for high-performance electrode materials is of great significance. Herein, a strategy to combine vertical graphene (VG) with MoO3 nanosheets to form a composite VG/MoO3 nanostructure is proposed. VGs as transition layers supply rich active sites for the growth of MoO3 nanosheets with increasing specific surface areas. The VG transition layer further improves the electric contact and adhesion of the MoO3 electrode, simultaneously stabilizing its volume and crystal structure during repeated redox reactions. Thus, the prepared VG/MoO3 nanosheets have been demonstrated to exhibit excellent electrochemical properties, such as high reversible capacitance, better cycling performance, and high-rate capability. Full article
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11 pages, 12804 KiB  
Article
Enhanced Luminous Efficacy and Stability of InP/ZnSeS/ZnS Quantum Dot-Embedded SBA-15 Mesoporous Particles for White Light-Emitting Diodes
by Chun-Feng Lai, Yu-Ching Chang and Yu-Shan Huang
Nanomaterials 2022, 12(9), 1554; https://doi.org/10.3390/nano12091554 - 4 May 2022
Cited by 5 | Viewed by 2890
Abstract
Environmentally friendly quantum dots (QDs) of InP-based materials are widely investigated, but their reliability remains inadequate to realize their full potential and wide application. In this study, InP/ZnSeS/ZnS QDs (pristine QDs) were dispersed and embedded into Santa Barbara Amorphous-15 mesoporous particles (SBA-15 MPs) [...] Read more.
Environmentally friendly quantum dots (QDs) of InP-based materials are widely investigated, but their reliability remains inadequate to realize their full potential and wide application. In this study, InP/ZnSeS/ZnS QDs (pristine QDs) were dispersed and embedded into Santa Barbara Amorphous-15 mesoporous particles (SBA-15 MPs) for the first time. A solvent-free method for preparing QD white light-emitting diodes (WLEDs) that is compatible with the WLED packaging process was developed. The photoluminescence (PL) spectrum of pristine QD powder exhibited cluster states and had huge redshift of approximately 23 nm. By comparison, the PL spectrum of the SBA-15 MP/QD hybrid powder had a slight redshift of approximately 8 nm, only because the pristine QDs were dispersed and embedded well in the SBA-15 MPs. The PL intensity of the SBA-15 MP/QD hybrid powder slightly decreased after heating and cooling compared with that of the pristine QDs. Moreover, the luminous efficacy of the SBA-15 MP/QD hybrid WLEDs was enhanced by approximately 14% compared with that of the pristine QD-WLEDs. Furthermore, reliability analysis revealed that the SBA-15 MPs could improve the stability of the pristine QDs on chips. Thus, these MPs promise good potential for applications in mini-LEDs in the future. Full article
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12 pages, 31423 KiB  
Article
Solution-Processed Smooth Copper Thiocyanate Layer with Improved Hole Injection Ability for the Fabrication of Quantum Dot Light-Emitting Diodes
by Ming-Ru Wen, Sheng-Hsiung Yang and Wei-Sheng Chen
Nanomaterials 2022, 12(1), 154; https://doi.org/10.3390/nano12010154 - 1 Jan 2022
Cited by 2 | Viewed by 2925
Abstract
Copper thiocyanate (CuSCN) has been gradually utilized as the hole injection layer (HIL) within optoelectronic devices, owing to its high transparency in the visible range, moderate hole mobility, and desirable environmental stability. In this research, we demonstrate quantum dot light-emitting diodes (QLEDs) with [...] Read more.
Copper thiocyanate (CuSCN) has been gradually utilized as the hole injection layer (HIL) within optoelectronic devices, owing to its high transparency in the visible range, moderate hole mobility, and desirable environmental stability. In this research, we demonstrate quantum dot light-emitting diodes (QLEDs) with high brightness and current efficiency by doping 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) in CuSCN as the HIL. The experimental results indicated a smoother surface of CuSCN upon F4TCNQ doping. The augmentation in hole mobility of CuSCN and carrier injection to reach balanced charge transport in QLEDs were confirmed. A maximum brightness of 169,230 cd m−2 and a current efficiency of 35.1 cd A−1 from the optimized device were received by adding 0.02 wt% of F4TCNQ in CuSCN, revealing promising use in light-emitting applications. Full article
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18 pages, 6779 KiB  
Article
Synthesis of Nanoparticles by Spark Discharge as a Facile and Versatile Technique of Preparing Highly Conductive Pt Nano-Ink for Printed Electronics
by Alexey A. Efimov, Pavel V. Arsenov, Vladislav I. Borisov, Arseny I. Buchnev, Anna A. Lizunova, Denis V. Kornyushin, Sergey S. Tikhonov, Andrey G. Musaev, Maxim N. Urazov, Mikhail I. Shcherbakov, Denis V. Spirin and Victor V. Ivanov
Nanomaterials 2021, 11(1), 234; https://doi.org/10.3390/nano11010234 - 18 Jan 2021
Cited by 27 | Viewed by 5358
Abstract
A cost-effective, scalable and versatile method of preparing nano-ink without hazardous chemical precursors is a prerequisite for widespread adoption of printed electronics. Precursor-free synthesis by spark discharge is promising for this purpose. The synthesis of platinum nanoparticles (PtNPs) using a spark discharge under [...] Read more.
A cost-effective, scalable and versatile method of preparing nano-ink without hazardous chemical precursors is a prerequisite for widespread adoption of printed electronics. Precursor-free synthesis by spark discharge is promising for this purpose. The synthesis of platinum nanoparticles (PtNPs) using a spark discharge under Ar, N2, and air has been investigated to prepare highly conductive nano-ink. The size, chemical composition, and mass production rate of PtNPs significantly depended on the carrier gas. Pure metallic PtNPs with sizes of 5.5 ± 1.8 and 7.1 ± 2.4 nm were formed under Ar and N2, respectively. PtNPs with sizes of 18.2 ± 9.0 nm produced using air consisted of amorphous oxide PtO and metallic Pt. The mass production rates of PtNPs were 53 ± 6, 366 ± 59, and 490 ± 36 mg/h using a spark discharge under Ar, N2, and air, respectively. It was found that the energy dissipated in the spark gap is not a significant parameter that determines the mass production rate. Stable Pt nano-ink (25 wt.%) was prepared only on the basis of PtNPs synthesized under air. Narrow (about 30 μm) and conductive Pt lines were formed by the aerosol jet printing with prepared nano-ink. The resistivity of the Pt lines sintered at 750 °C was (1.2 ± 0.1)·10−7 Ω·m, which is about 1.1 times higher than that of bulk Pt. Full article
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12 pages, 3140 KiB  
Article
2D Octagon-Structure Carbon and Its Polarization Resolved Raman Spectra
by Chunshan He and Weiliang Wang
Nanomaterials 2020, 10(11), 2252; https://doi.org/10.3390/nano10112252 - 13 Nov 2020
Cited by 8 | Viewed by 2623
Abstract
We predict a new phase of two-dimensional carbon with density functional theory (DFT). It was found to be semimetal with two Dirac points. The vibrational properties and the polarization resolved Raman spectra of the carbon monolayer are predicted. There are five Raman active [...] Read more.
We predict a new phase of two-dimensional carbon with density functional theory (DFT). It was found to be semimetal with two Dirac points. The vibrational properties and the polarization resolved Raman spectra of the carbon monolayer are predicted. There are five Raman active modes: 574 cm−1 (Eg), 1112 cm−1 (B1g), 1186 cm−1 (B2g), 1605 cm−1 (B2g) and 1734 cm−1 (A1g). We consider the incident light wave vector to be perpendicular and parallel to the plane of the carbon monolayer. By calculating Raman tensor of each Raman active mode, we obtained polarization angle dependent Raman intensities. Our results will help materials scientists to identify the existence and orientation of octagon-structure carbon monolayer when they are growing it. Full article
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Review

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53 pages, 10889 KiB  
Review
Surface and Interface Designs in Copper-Based Conductive Inks for Printed/Flexible Electronics
by Daisuke Tomotoshi and Hideya Kawasaki
Nanomaterials 2020, 10(9), 1689; https://doi.org/10.3390/nano10091689 - 27 Aug 2020
Cited by 75 | Viewed by 12045
Abstract
Silver (Ag), gold (Au), and copper (Cu) have been utilized as metals for fabricating metal-based inks/pastes for printed/flexible electronics. Among them, Cu is the most promising candidate for metal-based inks/pastes. Cu has high intrinsic electrical/thermal conductivity, which is more cost-effective and abundant, as [...] Read more.
Silver (Ag), gold (Au), and copper (Cu) have been utilized as metals for fabricating metal-based inks/pastes for printed/flexible electronics. Among them, Cu is the most promising candidate for metal-based inks/pastes. Cu has high intrinsic electrical/thermal conductivity, which is more cost-effective and abundant, as compared to Ag. Moreover, the migration tendency of Cu is less than that of Ag. Thus, recently, Cu-based inks/pastes have gained increasing attention as conductive inks/pastes for printed/flexible electronics. However, the disadvantages of Cu-based inks/pastes are their instability against oxidation under an ambient condition and tendency to form insulating layers of Cu oxide, such as cuprous oxide (Cu2O) and cupric oxide (CuO). The formation of the Cu oxidation causes a low conductivity in sintered Cu films and interferes with the sintering of Cu particles. In this review, we summarize the surface and interface designs for Cu-based conductive inks/pastes, in which the strategies for the oxidation resistance of Cu and low-temperature sintering are applied to produce highly conductive Cu patterns/electrodes on flexible substrates. First, we classify the Cu-based inks/pastes and briefly describe the surface oxidation behaviors of Cu. Next, we describe various surface control approaches for Cu-based inks/pastes to achieve both the oxidation resistance and low-temperature sintering to produce highly conductive Cu patterns/electrodes on flexible substrates. These surface control approaches include surface designs by polymers, small ligands, core-shell structures, and surface activation. Recently developed Cu-based mixed inks/pastes are also described, and the synergy effect in the mixed inks/pastes offers improved performances compared with the single use of each component. Finally, we offer our perspectives on Cu-based inks/pastes for future efforts. Full article
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