Polymer Chemistry
·
2016
·Vol. 7
·期 23
·3913-3922
·
IF 5.687
Fangfang Yu,Liwei Cao,Zhaohui Meng,Naibo Lin,Xiang Yang Liu
A study on the cross-linking of fluorinated acrylate and siloxane waterborne polyurethanes was carried out in order to produce a material with improved waterproof property. Trimethylolpropane-tris-(β-N-aziridinyl) propionate was employed as a simple, fast curing and low cost crosslinking agent. It follows that the acquired polyurethane film had the lowest water absorption and highest water contact angles so far among this series of compounds, and has better mechanical/thermal properties once the fluoride acrylic monomer content reaches 8 wt% and polyether modified polydimethylsiloxane content is 10 wt%. Once the crosslinked structure is acquired, the overall performance of the polyurethane films are enhanced, i.e. the water absorption decreases to 3.48% and n-heptane swelling decreases to 1.02%, the hardness reaches 6H and the tensile strength also rises to 33.2 MPa. Such eco-friendly crosslinked polyurethane films with outstanding waterproof property can find various applications in corrosion protection and optoelectronic devices.
研究领域:
材料科学
·
高分子化学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 22
·2300413
·
IF 8
Weirong Wang,Zhi Chen,Guanliang Yu,Yeming Zhang,Chun Jiang,Jianrong Qiu
Broadband near-infrared (NIR) emitting materials have gained considerable attention for their applications in lighting, displays, sensing, bio-imaging, and optical amplification. Recently, numerous excellent broadband NIR emitting materials are developed by introducing Cr 3+ , Bi + , or Ni 2+ ions to various hosts. However, there is a notable absence of reports on ultra-broadband NIR emitters spanning the entire telecommunication window as well as the NIR-I (700–1000 nm) and NIR-II (1000–1700 nm) biological windows activated by vanadium ions. Herein, the study presents, for the first time to the best of the knowledge, ultra-broadband NIR emission ranging from 850 to 1600 nm (peaking at ≈1000 nm) at room temperature in vanadium-doped phosphate glass. Detailed spectra and microscopic structure analysis reveal that two V 3+ -emitting centers predominantly contribute to the ultra-broadband emission, corresponding to 3 T 2 ( 3 F)→ 3 A 2 ( 3 F) spin-allowed and 3 T 2 ( 3 F)→ 1 E( 1 D) spin-forbidden electron transitions of tetrahedrally coordinated V 3+ ions. Notably, the tunability of NIR emission peak is demonstrated by adjusting the local glass structure or the vanadium doping content. Moreover, glass-converted light-emitting diodes (gc-LEDs) are fabricated from vanadium-doped glass, and the potential applications are demonstrated. The work opens new avenues for the design and fabrication of broadband NIR-emitting materials and opto-electronic devices.
研究领域:
材料科学
·
光学
·
光子学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Meihui Cui,Wei Ling,Lili Zhang,Yayang Li,Jing Liu,Tao Sun,Binglin Ma,Shenjunjie Lu,Huizhuo Pan,Gaoju Pang,Yingying Zhang,Shufang Zhang,Xian Huang,Peiqi Zhao,Duo Liu,Hanjie Wang
Point-of-care testing (POCT) has been widely employed for chronic disease diagnosis due to its portable testing modalities and fast medical decisions. However, conventional POCT techniques lack the means of rapid and precise treatment, deviating from the requirement of an integrated theragnostics system for home diagnosis and personalized therapy. Here, we present a smartphone-controlled, system-level bioelectronic drug with programmable point-of-care theragnostics (POCTH) for chronic kidney disease monitoring. The system features a urine-based colorimetric sensor for pathological quantification and engineered bacteria that can generate targeted immune regulators (IL-10) for disease modulation, allowing real-time, at-home chronic disease diagnosis and treatment. Customized smartphone applications have been developed for image capture, colorimetric analysis, and wireless transmission. Besides, a flexible optoelectronic device has also been fabricated for conformal integration with rats and wireless modulation of optogenetic bacteria. The system leads to sophisticated applications in physiological monitoring and personalized diagnosis of chronic diseases.
研究领域:
生物医学工程
·
纳米技术
·
光遗传学
·
即时检测
·
慢性疾病管理
·
生物电子学
·
移动健康
·
药物递送系统
·
生物传感器
·
免疫疗法
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2022
·Vol. 65
·期 11
·3105-3114
·
IF 8.64
Li Shun-Xin,An Yang,Sun Xiang-Chao,Zhu He,Xia Hong,Sun Hong-Bo
Organic semiconductors with excellent optoelectronic properties are important building blocks for high-performance organic devices. Patterning organic crystals with high precision and accurately positioning them at the target position are major challenges for integrated devices. However, uncontrollable dewetting of the conventional solution method leads to as-prepared micro-nanocrystals with high defect-state density, low crystalline quality, and disordered distribution, which impair the uniformity of the device performance and limit integration. By regulating the solution position with a template and guiding the solution flow direction under gravity, aligned organic microwire arrays and polygonal patterns were fabricated. The polarization-sensitive photodetector exhibited responsivity up to 1234 A W −1 , linear dynamic range of 148 dB, I photo / I dark of 10 4 , response time as low as 1.1 ms, and dichroic ratio up to 2.1. Given the homogeneity of microwire arrays, the device-to-device variation was reduced to 3.58%, resulting in high-quality imaging. This study provides new insights into organic micro/nanocrystal patterning and device integration.
研究领域:
材料科学
·
光电设备
·
半导体技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Pengli Li,Di Yang,Yeshu Tan,Muhan Cao,Qixuan Zhong,Min Chen,Huicheng Hu,Baoquan Sun,Yong Xu,Qiao Zhang
Although all-inorganic CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) have been considered as a promising material for photoelectronic devices, their applications are still limited because of their poor stability and the lack of in-depth understanding. Here, we demonstrate a post-treatment method for the preparation of ultrathin CsPbX3 nanowires (NWs) by treating CsPbBr3 nanocubes with thiourea solution. A systematic study showed a consecutive interfacial transformation process, in which CsPbBr3 nanocubes were first converted to Cs4PbBr6 NCs in the presence of thiourea, followed by a further transformation to CsPbBr3 NCs through an interfacial CsX-stripping process. To reduce the surface energy, an oriented attachment process has been realized and CsPbBr3 NCs aggregated to form ultrathin NWs. The ultrathin CsPbBr3 NWs exhibited high photoluminescence quantum yield (up to 60%) and high resistance to water treatment, which can be attributed to the surface passivation by thiourea. In addition to thiourea, cysteine and thioacetamide that contain the thiol group can also be used to trigger this transformation. This work can not only offer a facile method for the synthesis of efficient and stable ultrathin CsPbBr3 NWs but also help to reveal the in-depth mechanisms which may be very useful in the field of metal halide perovskite NCs.
研究领域:
材料科学
·
纳米技术
·
光电设备
·
无机化学
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 50
·505208
·
IF 3.874
Xin Zhai,Peng Dong,Wenxian Wang,Jing Jia,Lifang Hu,Guodong Feng
Silver nanowires (AgNWs) have been considered as one of the most promising flexible transparent electrodes (FTEs) material for next-generation optoelectronic devices. However, the large contact resistance between AgNWs could deteriorate the conductivity of FTEs. In the present work, high-performance AgNWs FTEs were obtained by means of focused-light-scanning (FLS), which could lead to the large-area, rapid and high-quality welding between AgNWs within a short time, forming the reliable and stable AgNWs network. The results of the optoelectronic tests show that after FLS, the sheet resistance of the AgNWs FTEs sharply decreased from 5113 Ω/sq to 7.7 Ω/sq, with maintaining a high transmittance (∼94%). Finally, a high-performance flexible transparent heater was fabricated by using FLS, showing reach a relatively high temperature in a short response time and rapid response at low input voltage. The findings offer an effective pathway to greatly improve the conductivity of AgNWs FTEs.
研究领域:
材料科学
·
纳米技术
·
光电设备
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Si-Zhe Sheng,Zhi-Yu Xian,Wen-Shuo Zhang,Jin-Long Wang,Xue-Fei Feng,Gang Pei,Bin Zhao,Jian-Wei Liu,Shu-Hong Yu
Smart windows, fabricated from stimulus-responsive chromogenic materials, can modulate the transparency of a window toward sunlight to control room temperature. The widespread implementation of this technology can improve indoor comfort and effectively reduce energy consumption. However, due to their initial optical properties, chromogenic materials in solid-state smart windows continue to absorb sunlight, causing overcooling and temperature instability. Here, stimulus-responsive chromogenic nanowires (NWs) and photothermal actuators are combined to create flexible, macro-deformed smart curtains. The difference in thermal expansion coefficient between bacterial cellulose and polyethylene in actuators allows the smart curtains to keep curled at low light intensities (off-state) and unroll under intense light (on-state). The solar modulation efficiency is further enhanced by the synergy of chromogenic (thermochromic or photochromic) NWs. When rolled up, the smart curtains allow ample sunlight to pass through ordinary windows (92.0% of solar radiation) for heating. They can achieve temperature reductions exceeding 6.0 °C, attributed to the regulation of solar radiation, with 62.3% for thermochromic smart curtains and 79.1% for photochromic smart curtains. Besides, the smart curtains can be mounted directly on the building frame without replacing existing windows. These results illustrate the feasibility of smart curtains and represent a conspicuous step toward sustainable building technologies.
研究领域:
材料科学
·
智能建筑技术
·
节能建筑
·
响应式材料
·
光电设备
✓ 已验证
DOI
PubMed
高影响因子
Science Bulletin
·
2019
·
IF 6.277
Mengnan Yao,Tengfei Li,Yongbing Long,Ping Shen,Guoxin Wang,Chenglong Li,Junshi Liu,Wenbin Guo,Yufei Wang,Liang Shen,Xiaowei Zhan
Semitransparent polymer solar cells (ST-PSCs) have attracted worldwide attention owing to unique superiority in multiple utilization of incident light. However, the color of ST-PSCs is relatively uniform after fabrication, cannot be dynamically tuned in terms of application requirement. Herein, we demonstrate a high-efficiency ST-PSCs as a smart window , which can be reversibly switched on and off by a gasochromic tungsten trioxide/platinum (WO 3 /Pt) back reflector layer. The ST-PSCs can be switchable between colored and bleached states with fast response speed of sub-second during hydrogen exposure. Meanwhile, the color and transparency-switching enable light trapping enhancement in long wavelength range, which can systematically improve power conversion efficiency (PCE). As a result, the ST-PSCs contribute a PCE of 10.2% and 9.1% as well as corresponding average visible transmission (AVT) of 25.4% and 33.8% at colored state and bleached state, respectively, which can meet the visual aesthetics requirement well in building integrated photovoltaics . To the best of our knowledge, this is the first example for ST-PSCs that achieve both color-switching and light trapping. Furthermore, the smart windows facing to automobile sunroof are proposed to prove a practical application towards commercialization. We believe that smart windows with gasochromic functions can promise potential opportunities and directions for the future development of ST-PSCs.
研究领域:
光伏技术
·
智能材料
·
能量收集
·
建筑一体化光伏
·
光电设备
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Huie Jiang,Lin Yang,Haiyan Ju,Lanxue Zou,Tianqi Zhao,Peng Guo,Qian Zhang,Haijiao Xie,Xinhua Liu
Room-temperature phosphorescent (RTP) materials have great prospects in the next-generation optoelectronic applications. However, developing safe, color-adjustable, ultra-long-lasting and eco-friendly RTP materials remains challenging. In this study, natural collagen (Col) and polyvinyl alcohol (PVA) were co-integrated through wet spinning technology, combined with aromatic amine phosphors, to construct biodegradable RTP fibers (Col/PVA/T, Col/PVA/B, Col/PVA/A). Through the hydrogen bond network between polymers and phosphorescent molecules, combined with the self-reinforcing rigid structure of the mixed matrix, Col/PVA/T fibers are endowed with outstanding RTP properties: phosphorescent lifetime up to 1.89 seconds, afterglow duration exceeding 14 seconds. The modular design strategy achieves adjustable multi-color emission (green/blue/yellow) by selecting phosphors. As inherently biocompatible and biodegradable materials, these fibers possess outstanding mechanical flexibility and textile compatibility, enabling the production of smart fabrics with excellent moisture permeability (1902 g m −2 24 h −1 ) and air permeability (368 mL cm −2 h −1 ). This research further demonstrates their transformative potential in anti-counterfeiting systems with time-resolved encryption capabilities and dynamic wearable displays. This work not only sets a new paradigm for eco-friendly luminescent textiles, but also Bridges the gap between sustainable materials and advanced photonic applications in personal safety and human-machine interfaces.
研究领域:
材料科学
·
光子学
·
可穿戴技术
·
可持续材料
·
光电设备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Huanyu Zhou,Houdong Mao,Xiangchuan Meng,Qingxia Wang,Licheng Tan,Yiwang Chen
Among recent explorations of flexible transparent electrodes (FTEs) applied in photoelectric devices, Ag nanowires (AgNWs) are widely used due to the advantages of high conductivity, large-scale manufacture and superior flexibility. However, relatively high roughness and contact resistance at junctions of Ag nanowire electrodes still affect the optoelectronic performance. Herein, adopting the ultraviolet nanoimprint lithography technology, the flexible Ag grids-based electrode without contact junctions has been prepared by electrolessly depositing metallic Ag on the exposed polydopamine (PDA) through coordination-bond interactions, which shows better flexibility and interfacial adhesion with comparison to the commercial PET/ITO. The light-emitting diode lamp bulb connected with PET/PDA@Ag grids electrode is still brilliantly lit after 200 continuous bending cycles with radius of 3 mm, suggesting robust mechanical stability . In addition, the PET/PDA@Ag grids-based polymer solar cells yield a power conversion efficiency of 11.6%.
研究领域:
材料科学
·
光电设备
·
纳米技术
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2022
·Vol. 8
·期 12
·2200620
·
IF 7.633
Guoliang Xiong,Gang Zhang,Xiaozhan Yang,Wenlin Feng
A novel 2D layered material Ti 3 C 2 T x (MXene) is favored by researchers in the application field of optoelectronics due to its tunable work function, great light transmittance, and excellent electrical conductivity. In this work, Ti 3 C 2 T x /n-germanium (MXene/n-Ge) Schottky heterostructures are fabricated and investigated. Schottky contacts of MXene with n-Ge are identified by ultraviolet photoelectron spectroscopy (UPS). Based on the MXene/n-Ge Schottky junctions, an ultrafast, broadband, and self-powered photodetector is demonstrated and studied. The MXene/n-Ge device exhibits excellent photoresponse from ultraviolet to near-infrared light illumination. In particular, it shows an excellent on/off ratio (≈10 4 ), a high responsivity (3.14 A/W), a larger specific detectivity (2.14 × 10 11 Jones), and an ultrafast response speed (t rise of 1.4 µs and t decay of 4.1 µs). Moreover, the MXene/n-Ge Schottky heterostructure photodetector also shows excellent low-temperature work characteristics of 73 K. It is believed that this work will attract more researchers’ attention to MXene in the field of optoelectronic devices.
研究领域:
材料科学
·
光电设备
·
半导体物理
✓ 已验证
DOI
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2021
·Vol. 15
·期 7
·2100169
·
IF 2.821
Tao Song,Bo Ma,Hao Wang,Xiao-Dong Zhang,Min Zhao,Pei-Zhu Zheng,Fei Gao,Qiang Wang,Hao-Li Zhang
One ancient recipe to produce rocky candies has found new applications in synthesizing Cs 4 PbBr 6 microcrystals, one 0D perovskite with [PbBr 6 ] 4− octahedra isolated by Cs + bridges that enable quantum confinement and high exciton binding energy favorable for photoluminescence (PL). Herein, various threads are used as seeds to grow perovskites microcrystals, in a way similar to rocky candy production recorded in ancient Chinese recipes. The Cs 4 PbBr 6 growth is an exothermic enthalpy driving process, with the surface energy differentiation determining the formation of rhombohedra shape. The synthesized Cs 4 PbBr 6 microcrystals show a large PL quantum yield (PLQY) of 31.5% and are used to fabricate white and green light-emitting diodes with high performance. Learning from history, this work provides one controllable and generally applicable avenue of fabricating high-quality perovskite crystals with promising applications in photonic and optoelectronic devices, and the elucidation of the growth mechanism offers useful guidance for critical factors directing crystal fabrications in future work.
研究领域:
材料科学
·
光学
·
光电设备
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）