| 編號： | 6 |
| 期刊或研討會名稱： |
Nanotechnology
|
| 著作名稱： | Modulating electronic transport properties of wafer-scale vapor–liquid–solid grown tungsten nitride by a vacuum gentle heating method
|
| 年度： | 2025 |
| 類別： |
期刊論文
|
| 摘要： | We study the electronic transport properties of W5N6 by vacuum gentle heating methods, which
are useful ways to probe the electronic transport properties in highly sensitive 2D materials.
Importantly, we found stable nearest-neighbor hopping behavior and Efros–Shklovskii variable
range hopping behavior by accumulating vacuum gentle heating time, which is highly
consistent with previous results in paramagnetic W5N6 to pave the way for applying to future
magnetic sensing devices in industrial production aspects due to its highly stable atmospheric
chemical doping on the surface, large-scale, ultra-thin, and resilient properties. |
| 關鍵字： | vacuum gentle heating, transport gap, nearest-neighbor hopping, Efros–Shklovskii variable range hopping, 2D materials, resistance curve derivative analysis method, tungsten nitride |
| 編號： | 7 |
| 期刊或研討會名稱： |
Journal of the Chinese Chemical Society
|
| 著作名稱： | Biochar integration in carbon fiber/epoxy-phenolic Systems for Enhanced Properties
|
| 年度： | 2025 |
| 類別： |
期刊論文
|
| 摘要： | Although Carbon Fiber Reinforced Polymers (CFRPs) are recognized for their
remarkable strength-to-weight ratio, their overall performance is sometimes
limited by the thermal and mechanical constraints of traditional epoxy resins.
This study directly targets these deficiencies by developing a next-generation
composite based on an advanced epoxy-phenolic resin matrix. This complicated
matrix functions as the high-performance basis of our system, chosen
expressly for its superior heat stability, chemical resistance, and toughness relative
to conventional epoxies. Initiating with a more substantial matrix yields
a more durable composite from the beginning. We are using wood-derived biochar
as a sustainable, useful filler to enhance this system. This work examines
the potent synergistic interactions among three essential components: the reinforcing
carbon fibers, the durable epoxy-phenolic matrix, and the multifunctional
biochar. Our study entails precisely regulated pyrolysis to generate
superior biochar and a comprehensive examination of its effects on the composites
interfacial dynamics and overall efficacy. This study seeks to illustrate
how biochar, incorporated inside a meticulously chosen epoxy-phenolic
matrix, may substitute industrial carbon black. The objective is to develop ecologically
friendly, high-performance composites with improved mechanical
properties and functions, aiding in the achievement of net-zero carbon emission
goals. |
| 關鍵字： | biochar, carbon black replacement, carbon fiber reinforced polymer (CFRP), epoxy-phenolic resin, interface, multi-functional filler, sustainable materials |
| 編號： | 8 |
| 期刊或研討會名稱： |
Nano Letters
|
| 著作名稱： | Electron Cloaking in MoS2 for High-Performance Optoelectronics
|
| 年度： | 2025 |
| 類別： |
期刊論文
|
| 摘要： | Defects in two-dimensional (2D) materials represent both challenges and opportunities to their optoelectronic performance. While defects limit the carrier mobility in transistors through increased charge scattering, they also enhance 2D material functionality in sensors. Electron cloaking, a process that reduces Coulomb scattering via localized electron−defect interactions, has recently been shown to mitigate the performance degradation of bulk semiconductors in the presence of defects. We demonstrate the realization of electron cloaking in 2D materials through the metal decoration of defects. Sulfur vacancies were introduced in MoS2 and selectively decorated with aluminum using atomic layer deposition. Theoretical and experimental characterization demonstrate the suppression of electronic scattering through localized interactions. Optoelectronic measurements reveal a significant improvement in carrier mobility and lifetime, highlighting the effectiveness of the cloaking mechanism. Our findings open a route independently to maximize performance and functionality of optoelectronic devices, which is illustrated by the realization photosensors with unprecedented sensitivity and speed. |
| 關鍵字： | 2D material, defect-limited mobility, electron cloaking, Coulomb scattering, electron−defect interaction, MoS2, vacancies |
| 編號： | 9 |
| 期刊或研討會名稱： |
Nanotechnology
|
| 著作名稱： | A low-cost broadband photodetector based on CsPbBr3 quantum dots/transfer-free eco-friendly graphene heterostructures for fast photoresponse
|
| 年度： | 2025 |
| 類別： |
期刊論文
|
| 摘要： | We have successfully demonstrated CsPbBr3 perovskite quantum dots (QDs)/transfer-free eco-friendly (TFEF) graphene heterostructures with broadband and fast photoresponse. At first, the TFEF graphene is grown directly on the SiO2/Si substrates in an atmospheric pressure chemical vapor deposition (APCVD) system with the copper-foil wrapping methods and camphor precursors. Raman mapping image (15 × 15 μm2) showed TFEF graphene with high coverage across the surface (∼65% single-layer graphene, ∼15% bilayer graphene, and ∼20% multilayer graphene). After that, CsPbBr3 QDs were synthesized and then spin-coated on the TFEF graphene surface to form heterostructures. Compared to pure CsPbBr3 QD-based photodetectors (PDs), CsPbBr3 QDs/TFEF graphene-based PDs show a higher photo-to-dark current ratio of ∼7.2 at 2 V white light illumination (112 mW cm−2). Furthermore, the CsPbBr3 QDs/TFEF graphene-based PDs show a broadband photoresponse range from ultraviolet to near-infrared with a peak responsivity reaching up to 32 mA W−1, a high detectivity (2.2 × 1010 cm·Hz1/2/W) and fast operation speed (rise/fall time: ∼7/∼ 14 ms). This study opens avenues to develop low-cost and rapid fabrication processes of perovskite/2D nanomaterial-based PDs for fast optical communication, image capture, and flame detection applications. |
| 關鍵字： | CsPbBr3, perovskite quantum dot, transfer-free graphene, APCVD, camphor, photodetector |
| 編號： | 4 |
| 期刊或研討會名稱： |
68th Annual SVC Technical Conference
美國
|
| 著作名稱： | 1. Sheng-Kuei Chiu, Ya-Chiu Tsai, Chia-Chun Wu, Chien-Jen Tang
|
| 年度： | 2025 |
| 類別： |
會議論文
|
| 摘要： | CIGS solar cell is one of the most promising candidates for future photovoltaic applications because it is a material with a direct band gap, high absorption coefficient, tunable band gap, and high material stability. In this study, CIGS thin films were deposited by magnetron sputtering from two quaternary targets with the composition of Cu-poor and Cu-rich targets. As-deposited thin films were selenized by a rapid thermal annealing process to improve the quality of absorber layers. We investigated the influence of post-annealing temperature and post-annealing time on material composition, crystalline structure, raman spectrum, and microstructure. We observed when CIGS film was annealed at 500°C and for 30 minutes, it had better crystallization and less second phase. The study also used chemical bath deposition (CBD) and magnetron sputtering to produce buffer layers and analyzed optical properties and microstructure. Solar cell structure, from top to bottom, were stacked by Ag (Sputtering, 300 nm), AZO (Sputtering, 400 nm), i-ZnO (Sputtering, 50 nm), CdS (Sputtering or CBD, 50 nm), CIGS (Sputtering, 1500 nm~2000 nm), Mo (Sputtering, 1000 nm) and SLG. The measured highest conversion efficiency of the CIGS solar cell is 4.6 % with an open voltage of 412.5 mV, short circuit current density of 19.14 mA⁄cm2, and fill factor of 57.75 % by Cu-poor target. Solar cells fabricated by Cu-rich target showed a conversion efficiency of 0.7 % with an open voltage of 315 mV, short circuit current density of 6.09 mA/cm2, and fill factor of 34.86 %. Solar cell efficiency can be improved by adjusting the ratio of the quaternary-alloy target.
|
| 關鍵字： | CIGS solar cell, selenization, Chemical Bath Deposition, magnetron sputtering |
| 編號： | 1 |
| 期刊或研討會名稱： |
Nanoscale
|
| 著作名稱： | Intrinsic setting of exciton state in MoS2 monolayer via tailoring Moiré correlation with a sapphire substrate
|
| 年度： | 2025 |
| 類別： |
期刊論文
|
| 摘要： | This study aims to elucidate the specific Moiré correlation and associated exciton properties within MoS2 monolayers grown randomly oriented on a c-cut single-crystalline sapphire (Al2O3) substrate, which facilitates a distinct Moiré correlation. Notably, the exciton state in MoS2 monolayers appeared periodically linked to the stacking geometry with the sapphire substrate. Specifically, the observed stacking configuration of MoS2[11[2 with combining macron]0]/Al2O3[11[2 with combining macron]0] induced a redshifted exciton state, while a 30-degree-misaligned stacking, such as MoS2[11[2 with combining macron]0]/Al2O3[01[1 with combining macron]0], increased the exciton energy. The variation in the exciton state due to changes in the stacking geometry between MoS2 and sapphire thus exhibited a 6-fold periodicity, reflecting the combination of hexagonal MoS2 and the trigonal sapphire substrate. This transition in the exciton state of the MoS2 monolayer was attributed to stacking-induced strain: the MoS2[11[2 with combining macron]0]/Al2O3[11[2 with combining macron]0] stack resulted in a closely packed nature with induced tensile strain in the film plane, whereas the MoS2[11[2 with combining macron]0]/Al2O3[01[1 with combining macron]0] stack appeared lightly packed, thus rendering the MoS2 structurally relaxed. These findings regarding the stacking-induced strain issues are consistent with the results of Raman spectra. This work underscores the potential for manipulating the crystallographic stacking between single-crystalline MoS2 monolayers and sapphire substrates to serve as a versatile platform for investigating photonics in MoS2-based heterostructures. |
| 關鍵字： | |
| 編號： | 3 |
| 期刊或研討會名稱： |
Surface and Coatings Technology
|
| 著作名稱： | The effect of the precursors and chemical vapor deposition process on the synthesis of two-dimensional molybdenum nitride nanomaterials
|
| 年度： | 2025 |
| 類別： |
期刊論文
|
| 摘要： | Researchers have extensively investigated 2D nanomaterials of TMN owing to its superior chemical and physical characteristics and numerous potential uses. Research on the synthesis of TMNs was insufficient and remained stagnant. Here, we alter precursor types and substrates and develop three CVD procedures for synthesizing TMN. High-quality signal-crystal MoN nanoflakes were synthesized using sodium molybdate precursors. The same growth conditions directly induced the formation of Mo5N6 nanofilms on sapphire substrate. We synthesized large-area MoN nanofilms on silicon substrates by conducting a nitrogen substitution reaction on MoS2 nanofilms. MoS2 serves as the precursor for MoN nanofilms synthesis via nitridation. MoNs characteristic peak at 143.34 cm−1 was located using Raman spectroscopy. We obtained epitaxial growth of Mo5N6 nanofilms at low pressure (66 cm Hg) on a sapphire substrate. Mo5N6 nanofilms exhibited a distinctive Raman spectroscopy signal at 154.03 cm−1. In anticipation of its prospective applications, we assessed the electrical properties of Mo5N6 nanofilms. Additionally, the resistivity of Mo5N6 was found to be 1.555*10−5 Ωcm. Large-area 2D nanomaterials, such as Mo5N6, have the potential to be employed as graphene or other semimetal materials in the electronic device industry, as evidenced by the temperature dependency of the conductivity test. |
| 關鍵字： | |
| 編號： | 2 |
| 期刊或研討會名稱： |
NANOTECHNOLOGY
|
| 著作名稱： | Deposition of VS2/MoS2 bilayer layers of 2D material on nickel inverse opal structural substrates by SILAR and ECD processes as supercapacitor electrodes
|
| 年度： | 2025 |
| 類別： |
期刊論文
|
| 摘要： | The composition, microstructure, and electrochemical properties of the two kinds of thin film electrode materials, namely VS2/MoS2/Ni-IOS and VS2/MoS2/Ni-foam, were analyzed. The research results indicate that the self-assembled photonic crystal (PhC) templates with adjusted electrophoretic self-assembly processing parameters (100 V cm−1; 7 min) would lead the specimen to a face-centered closely packed structure. Metallic nickel inverse opal structure (IOS) PhCs whose thickness can be freely regulated simply by electrochemical deposition time. VS2 and MoS2 are 2D materials with excellent electrochemical properties. We employed them as the electroactive material in this study and deposited them onto nickel IOS (Ni-IOS) surfaces to form a composite of The specimens exhibited an excellent specific capacitance (2180 F g−1) at a charge–discharge current density of 5 A g−1. After the 2000 cycles during the life test, the sample can still retain the original specific capacitance value by 72.3%. The IOS PhC substrate produced in this work is designed as VS2/MoS2/Ni-IOS supercapacitor electrode materials, which is proved to offer a significant technical contribution to the application of 2D materials in high-performance supercapacitors currently. |
| 關鍵字： | supercapacitor electrode materials, electrophoretic self-assembly (EPSA), electrochemical deposition (ECD), successive ionic layer adsorption and reaction (SILAR), photonic crystals (PhCs), inverse opal structure (IOS), polystyrene (PS) microspheres |
| 編號： | 5 |
| 期刊或研討會名稱： |
The 2024 International Conference on Green Electrochemical Technologies and the 2024 Annual Meeting of Electrochemical Society of Taiwan
台灣
|
| 著作名稱： | Study on the hydrogen evolution reaction of preparing metal-glycerate high-entropy alloys
|
| 年度： | 2024 |
| 類別： |
會議論文
|
| 摘要： | High-entropy alloys (HEAs) are crystalline solids that are frequently composed of five or more elements. Their enhanced physicochemical properties have recently garnered significant attention in comparison to conventional alloys. High-entropy alloys exhibit exceptional efficacy in a variety of electrocatalytic processes. However, the utilization of HEA catalysts in the glycerol oxidation process (GOR) has not received an adequate amount of attention. Due to the numerous types and architectures of HEA materials, there is a substantial opportunity to improve GOR HEA electrocatalysts. Consequently, the studys objectives are to utilize solvothermal synthesis to produce a multi-metal-glycerate material on the surface of graphite felt electrodes, and to assess the materials capacity to expedite the hydrogen evolution reaction by adjusting the reaction temperature, time, and glycerin concentration. At a current density of 10 mA cm-2, the optimal process parameters demonstrated a charge-transfer resistance of 6.98 Ω and a lowest overpotential of 308 mV. |
| 關鍵字： | High-entropy alloys (HEAs), hydrogen evolution reaction (HER), glycerol oxidation process (GOR) |