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Novel Materials for Sensing, Imaging and Energy Conversion/Storage

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A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Materials for Chemical Sensing".

Deadline for manuscript submissions: closed (29 February 2024) | Viewed by 8162

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Special Issue Editor

Dr. Heongkyu Ju

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Guest Editor

Department of Physics, Gachon University, Seongnam-daero 1342, Bokjeong-dong, Sujeong-gu, Seongnam-si 13120, Gyeonggi-do, Republic of Korea
Interests: plasmonics; nanoscale platform; bio-chemical sensors; supercapacitors; solar cells; advanced imaging devices; LED; fluorescence based diagnosis; surface enhanced spectroscopy; 2D materials

Special Issue Information

Dear Colleagues,

Recent advances in nanotechnologies and development of brand new materials have been ramping up capability of devices for sensing, imaging, and energy conversion/storage required in various fields such as biosensors, hazardous environment assessment, image displays and solar cells/super capacitors. Most of the applications usually require the better performance of devices with a smaller size, more cost effectiveness, less power consumption, higher bandwidths, and shorter operation times.

For the sake of achieving this goal in sensing applications, sensor transduction that relies on analyte-induced changes in optical/electrical properties or biochemical reactions needs to be suitably engineered using those novel materials platforms. Future imaging applications are also expected to find new nanostructured architectures of given materials or newly discovered materials, usually demanding multidisciplinary knowledge and expertise across various fields. Furthermore, the last piece technology to put the above-mentioned technologies together would be the state-of the-art energy conversion/storage devices for eco-friendly and energy efficient life.

This special issue aims to gather experimental or theoretical reports interesting enough to bring continual attention to develop such novel materials and the related material platforms towards the advanced devices for sensing, imaging, and energy conversion/storage. The scope of the special issue thus covers development of novel materials, the related structure and novel working principles used in biomedical assay, chemical detection, environment monitoring, high-resolution display, invisible electromagnetic radiation detection/imaging, photovoltaic cells and super-capacitors.

Dr. Heongkyu Ju
Guest Editor

Manuscript Submission Information

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Keywords

bio/chemical sensors
UV/IR sensors
high-resolution display
LED
plasmonics
fluorescence
surface enhanced spectroscopy
nanomaterials
solar cell
super-capacitors

Published Papers (4 papers)

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Research

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10 pages, 1660 KiB

Open AccessArticle

Mass-Mediated Phase Modulation of Thin Molybdenum Nitride Crystals on a Liquid Cu-Mo Alloy

by Minghui Li, Qing Zhang, Yixuan Fan, Lin Li, Dechao Geng and Wenping Hu

Chemosensors 2023, 11(2), 82; https://doi.org/10.3390/chemosensors11020082 - 21 Jan 2023

Cited by 3 | Viewed by 1776

Abstract

The high-quality and controllable preparation of molybdenum nitrides (Mo_xN_y) will significantly advance the fields of heterogeneous catalysis, energy storage, and superconductivity. However, the complex structure of Mo_xN_y, which contains multiple phases, makes exploring the structure-property relationship challenging. The selective preparation of Mo_xN_y with distinct phases is undoubtedly an effective method for addressing this issue, but it is lacking experimental cases and theoretical reports. Here we demonstrate a feasible chemical vapor deposition (CVD) strategy for selectively producing γ-Mo₂N or δ-MoN through modulating the mass quantity of N precursors. A liquid Cu-Mo alloy was used as a Mo precursor and catalyst in this system. The resulting γ-Mo₂N was systematically characterized and found to be of high quality. Furthermore, the morphology evolutions of γ-Mo₂N and δ-MoN with growth time were summarized in detail, as a result of growth and etching dynamics. This work promotes the phase modulation of Mo_xN_y and provides a framework for future research on the structure-property relationship. Full article

(This article belongs to the Special Issue Novel Materials for Sensing, Imaging and Energy Conversion/Storage)

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15 pages, 5315 KiB

Open AccessArticle

Metal-Enhanced Fluorescence for Alpha-Fetoprotein Detection and for SERS Using Hybrid Nanoparticles of Magnetic Cluster Core—Plasmonic Shell Composite

by Lam Gia Phuc, Phuong Que Tran Do, Hanh Kieu Thi Ta, Vinh Quang Dang, Sang-Woo Joo, Do Hung Manh, Ta Ngoc Bach, Tran T. T. Van and Nhu Hoa Thi Tran

Chemosensors 2023, 11(1), 56; https://doi.org/10.3390/chemosensors11010056 - 09 Jan 2023

Cited by 2 | Viewed by 1695

Abstract

We demonstrated that the hybrid core–shell nanostructure of Fe₃O₄ (core) and gold (shell) could be a good substrate candidate both for metal-enhanced fluorescence (MEF) and surface-enhanced Raman spectroscopy (SERS). The magnetic properties of the core material could provide functionalities such as the magnetically induced aggregation/distribution of nanostructures to increase the hot-spot density, while the nano-thickness gold shell allows for the plasmonic enhancement of both fluorescence and SERS. The gold-capped magnetic (Fe₃O₄) nanoparticles (GMPs) were facilely synthesized using a newly developed chemical method. The relative molar ratio of the constituent materials of the core–shell composite was optimized for tuning the plasmonic resonance wavelengths for MEF and SERS. We employed GMP-based MEF to detect alpha-fetoprotein (AFP), with concentrations ranging from 0.05 to 1000 ng/mL, and obtained a limit of detection (LOD) as low as 3.8 × 10⁻⁴ ng/mL. The signal enhancement factor (EF) in the GMP-based MEF was 1.5 at maximum. In addition, the GMPs were used in SERS to detect rhodamine B (RhB). Its LOD was 3.5 × 10⁻¹² M, and the EF was estimated to be about 2 × 10⁸. The hybrid core–shell nanoparticles could find potential applications in diagnostic assays based on MEF and SERS in various fields such as food verification, environmental testing/monitoring, and disease diagnosis. Full article

(This article belongs to the Special Issue Novel Materials for Sensing, Imaging and Energy Conversion/Storage)

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Graphical abstract

15 pages, 7805 KiB

Open AccessArticle

High-Temperature-Sensing Smart Bolt Based on Indium Tin Oxide/In₂O₃ Thin-Film Thermocouples with Nickel-Based Single-Crystal Superalloy via Screen Printing

by Zhongkai Zhang, Jiangjiang Liu, Rongfu Cai, Zhaojun Liu, Jiaming Lei, Ruolin Sun, Ningning Wu, Na Zhao, Bian Tian and Libo Zhao

Chemosensors 2022, 10(9), 347; https://doi.org/10.3390/chemosensors10090347 - 23 Aug 2022

Cited by 2 | Viewed by 2002

Abstract

In this study, thin-film thermocouples (TFTCs) were combined with a smart bolt to design a smart bolt that can directly test high temperature in service monitoring and parameter calculation for gas turbine structure design. The first-principles calculation was used to analyze the design of the surface properties of nickel-based alloys and insulating layers, and finite element analysis was used to optimize dimension parameters by controlling the thermal stress matching of insulating layers and sensitive layers. The effect of the glass powder with different particle sizes on the microstructure of the ITO and In₂O₃ films was studied via SEM. The preferred particle size of the additive glass powder is 400 nm. The XRD pattern shows the (222) peak has the highest intensity. The intensities of the (222) and (622) peaks increase after the heat treatment. The calibration results show that the average Seebeck coefficient of the TFTCs can reach 64.9 μV/°C at 1100 °C with a maximum voltage of 71.4 mV. The repeatability error of the cycles of the sensor after heat treatment is ±1.05%. The repeatability of the sensor is up to 98.95%. The smart bolts were tested for application in small aero engines. It can be seen that under the impact of 1000 °C, the thermal response of the prepared smart bolt is better than that of the K-type armored thermocouple, and the thermal balance is achieved faster. The intelligent bolt sensor proposed in this work has better engineering application prospects owing to its convenience of installation in harsh environments. Full article

(This article belongs to the Special Issue Novel Materials for Sensing, Imaging and Energy Conversion/Storage)

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Review

Jump to: Research

38 pages, 4757 KiB

Open AccessReview

Recent Progress in the Core-Shell Nanostructures of the NiMoO₄-Based Composite Materials for Supercapacitor Applications: A Comprehensive Review

by Kandasamy Sasikumar and Heongkyu Ju

Chemosensors 2022, 10(12), 516; https://doi.org/10.3390/chemosensors10120516 - 06 Dec 2022

Cited by 2 | Viewed by 2071

Abstract

Supercapacitors have emerged as one of the promising energy storage systems owing to their rapid charge/discharge capability, long-term cycling stability, and high power density. The application of core-shell nanostructures for supercapacitors is one of the effective strategies to achieve a high specific surface area for abundant reaction sites and good electrical conductivity for fast charge transfer, hence improving the performance of supercapacitors. Particularly, the use of NiMoO₄ for the core-shell structure has drawn great attention due to its outstanding advantages, such as its natural abundance, low material cost, superior electrochemical performance, and wide electrochemical potential window in cyclic voltammetry. In this context, this review comprehensively covers the recent progress of the core-shell nanostructures based on the NiMoO₄-composite materials, which find applications in supercapacitors. The composite materials that incorporate metal oxides such as NiMoO₄, metal hydroxides, metal chalcogenides, carbon materials, and conductive polymers are discussed in detail for such core-shell nanostructures with the aim of understanding how the adopted materials and the relevant morphology govern the electrochemical features for supercapacitors. Finally, the existing challenges in current technologies for supercapacitors are discussed, while possible future directions in developing the NiMoO₄-composite-based core-shell nanostructures are proposed for high-performance supercapacitors. Full article

(This article belongs to the Special Issue Novel Materials for Sensing, Imaging and Energy Conversion/Storage)

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