Applied Sciences-Basel
·
2022
·Vol. 12
·期 21
·11202
·
IF 2.838
Jie Yang,Zhibo Zhou,Tianji Lu,Ling Shen
The present work reports the identification of inorganic and organic materials applied in gildings of Kizil Grottoes mural paintings, located in the western part of China. A total of 10 gold gilding samples were collected from caves dated in the fourth–seventh century AD. In this research, optical microscopy, scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX), UV fluorescence microscopy, and pyrolysis gas chromatography–mass spectrometry (Py-GC/MS) analyses were carried out to clarify the mordant materials and the coating materials on the foils. This research reports some new finds of the gilding technique in Kizil grottoes, such as oil and lac resin being used as mordant to provide a binding medium for gold gilding, gold powder probably being used as pigment, and some organic dyes being well preserved under gold foil. These interesting findings not only provide scientific evidence for us to understand the materials and techniques of gold gildings on Kizil Grottoes murals, but also illustrate material trade and technique exchanges along the Silk Road in the past.Keywords:gilding;lac resin;organic materials;Kizil Grottoes
研究领域:
考古学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lei Zhu,Changyou Zhang,Qiwang Shao,Mengxuan Qin,Qing Li,Chao Peng,Chunchen Yuan,Donghong Wang,Chunyi Zhi
Due to their structural diversity, environmental friendliness, and resource renewability, organic electroactive compounds are versatile hosts for the energy storage of different metal ions. However, the consistency and variety of the energy storage performance and mechanism for the designed organic electrode materials in aqueous electrolytes toward different metal ions have rarely been researched. Here, one type of organic material integrated with anhydride and imide groups was designed and studied in detail. Among the two functional groups, the anhydride carbonyl groups were found to be the dominant contributors during the initial discharge step due to the higher binding energy toward the different metal ions, while the imides were responsible for the second-step coordination with monovalent metal ions. With the increment of the valence of guest metal ions, the activity of the imides decreased and became nearly inactive for the storage of aluminum ions. On the contrary, the anhydride carbonyl groups were always active for the storage of various metal ions and became the capacity contributors when the valence of the metal ions increased. Moreover, similar energy storage behaviors and close potentials were detected during the first discharge step for these different metal ions.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Photonics Research
·
2021
·Vol. 10
·期 1
·50-58
·
IF 7.08
Yonghua Wang,Su He,Xiaoyan Gao,Piaopiao Ye,Lei Lei,Lei Lei,Wenchan Dong,Wenchan Dong,Wenchan Dong,Xinliang Zhang,Xinliang Zhang,Ping Xu
Silicon photonic integrated devices used for nonlinear optical signal processing play a key role in ultrafast switching, computing, and modern optical communications. However, current devices suffer from limited operation speeds and low conversion efficiencies due to the intrinsically low nonlinear index of silicon. In this paper, we experimentally demonstrate enhanced optical nonlinearity in a silicon–organic hybrid slot waveguide consisting of an ultranarrow slot waveguide coated with a highly nonlinear organic material. The fabricated slot area is as narrow as 45 nm, which is, to the best of our knowledge, the narrowest slot width that has been experimentally reported in silicon slot waveguides. The nonlinear coefficient of the proposed device with a length of 3 mm is measured to be up to 1.43×106 W−1 km−1. Based on the nanostructure design, the conversion efficiencies of degenerate four-wave mixing showed enhancements of more than 12 dB and 5 dB compared to those measured for an identical device without the organic material and a silicon strip waveguide, respectively. As a proof of concept, all-optical canonical logic units based on the prepared device with two inputs at 40 Gb/s are analyzed. The obtained logic results showed clear temporal waveforms and wide-open eye diagrams with error-free performance, illustrating that our device has great potential for use in high-speed all-optical signal processing and high-performance computing in the nodes and terminals of optical networks.
研究领域:
光学
·
材料科学
·
通信工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 23
·18497-18506
·
IF 2.779
Ji Rongxue,Li Ruixiang,Feng Guangdi,Lao Jie,Jiang Chunli,Tian Bobo,Luo Chunhua,Lin Hechun,Peng Hui,Duan Chun-Gang
Optoelectronic synapses have been attracting significant attention due to their important role in visual information processing. In this work, we fabricate an all-organic optoelectronic synaptic device with a double heterojunction structure of PEDOT:PSS/poly(vinylidene fluoridetrifluoroethylene) (P(VDF-TrFE))/copper (II) phthalocyanine (CuPc) by a simple preparation process. The introduction of a dielectric P(VDF-TrFE) layer between PEDOT:PSS and CuPc layers benefits the trapping of charge carriers and slows down the electron-hole recombination rate. This two-terminal optoelectronic device is successfully applied to simulate synaptic functions of biological synapses by using optical pulses of 660 nm, including paired-pulse facilitation, spike-duration dependent plasticity, spike-rate dependent plasticity, spike-number dependent plasticity, and learning-experience behavior. Furthermore, the key characteristics of a nociceptor and the optical logic function of the “AND” and “OR” operations are also emulated. This work illustrates the potential of such device for constructing neuromorphic computing systems at the physical level.
研究领域:
材料科学
·
神经科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Shimei Xu,Song Liu,Yanlin Zhou,Rengui Xiao,Xiang Ke
Organic materials have garnered significant attention due to abundant resources, recyclability, and ease of design. However, they are hampered in practical applications by poor conductivity and high solubility. Herein, a lithium metal battery is developed in this work, utilizing the cathode material polyanthraquinonyl sulfide (PAQS) doped with a trace of NaCl. Additionally, the ionic liquid lithium bis-trifluoromethanesulfonimide and lithium metal as the anode. Physicochemical characterizations utilizing Raman spectroscopy and X-photoelectron spectroscopy indicate that both Na + and Li + migrate within the cell, forming a dual-cation battery. In addition, the battery displays exceptional rate performance with a capacity of 86 mAh·g −1 at 20 C, which is more than triples the capacity without NaCl, and has excellent cycling performance. Moreover, it retains 98 % capacity after 1000 cycles at 2 C with no significant degradation. This research offers an innovative strategy for developing a high-performance double-cation battery.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Xiaoqi Lan,Tongzhou Wang,Congcong Liu,Peipei Liu,Jingkun Xu,Xiaofang Liu,Yukou Du,Fengxing Jiang
Fiber-based materials have gained great concern in wearable organic electrons due to reliable flexibility and excellent electron transport property. Thermoelectric (TE) conversion has been regarded as a promising energy harvesting for protable electron devices . However, the development of n-type organic material with good environmental stability hinder the further assembling of an all-organic TE generator. Herein, we designed and proposed an all-organic TE fiber generator composed of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) and carbon nanotube (CNT) fibers. The p-type conductive fabrics with a relatively high electrical conductivity (18.8 S cm −1 ) were prepared based on the common cotton fabric (CNF) by simple soaking in PEDOT:PSS solution. The n-type CNT ( n -CNT) fibers were obtained through polyethylenemine (PEI) treated p-type CNT ( p -CNT) resulting in a high electrical conductivity (871 S cm −1 ) and Seebeck coefficient (−58 μV K −1 ) with excellent environmental stability. The flexible fiber-based TE generator was assembled by connecting p-type PEDOT:PSS-coated CNF (CNF@PP) and n -CNT fibers in series allowing a large output power (375 μW). The fabrication of all-organic fiber generator can promote the further development of organic TE energy harvest in wearable electrons.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Jianhui Yuan,Xuelin Dong,Binbin Zhang,Qi Zhou,Shan Lu,Qin Wang,Yonggui Liao,Yajiang Yang,Hong Wang
A facile fabrication strategy of fluorescence-phosphorescence dual emissive materials based on the supramolecular gels was proposed in this work. In comparison with complicated fabrication of conversional dual emissive materials, supramolecular gels are formed just through a simple heating and cooling of solution containing a gelator and phosphor. The gel system is pure organic without any metal ions. Herein, the self-assembly of gelator N, N-dibenzoyl- l -cystine (DBC) resulted in the formation of gel system. The phosphor 3,5-Dibromoquinoline (BrQ) entrapped in the gels endowed gels with fluorescence-phosphorescence dual emission. Upon 315 nm UV irradiation, strong room temperature fluorescence and phosphorescence emission were observed at 367 and 550 nm, respectively. The ability of dual emission at room temperature could be attributed to the ordered microstructure of the supramolecular gels, effectively avoiding the non-radiative transition of BrQ. In addition, the gel system exhibited environmental responsiveness including thermal, pH and redox response due to the structural feature of DBC gels. The dual emission can be tuned by this responsiveness. Particularly, the deoxygenation of gel system is not required. Conversely, the dissolved oxygen in the system can be employed for redox reaction without the addition of any other oxidant.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2022
·
IF 5.122
Hui Zhang,Shuhui Bo,Ji Zhang,Yuhui Ao,Ming Li
Developing new organic second-order nonlinear optical chromophores with a new electron donor is crucial for enhancing performance of electro-optic (EO) materials. A series of new second-order nonlinear optical chromophores (J1, JS and JO) with new electron donor 1-Oxajulolidine have been designed and synthesized. Ref1, Ref2 and Ref3 with N, N-diethylaniline (DEA), 4-anisole and julolidine as electron donor had also been synthesized for comparison. The result of TGA and DSC tests suggested that the decomposition temperature of the chromophores was higher than 260 °C. As the UV–vis absorption spectra of chromophores in solution, maximum absorption ( λ max ) of the chromophores J1 with 1-Oxajulolidine group presented red-shift compared to Ref1 and Ref2, but blue-shift to Ref3. Nevertheless, chromophore with 1-Oxajulolidine presented more obvious solvatochromic behavior from dioxane to dichloromethane . Density functional theory had been used to calculate HOMO-LUMO energy gaps and β of these chromophores. The r 33 values of guest-host EO polymers Ref1/APC , J1/APC , JS/APC and JO/APC with a loading density of 10 wt% were obtained as 7.5, 9.6, 15.3 and 13.5 pm V −1 , respectively. The above result clearly indicated that r 33 of J1/APC (9.6 pm V −1 ) was 27% higher than that of Ref1/APC (7.5 pm V −1 ). The electro-optic coefficient of JS with the same conjugate bridge and acceptor was higher than that of FTC in the same doping concentration. As revealed by the above results, the introduction of the polycyclic structure of 1-Oxajulolidine, containing two electron-rich atoms (N and O) , could efficiently enhance the electro-optical performance. Furthermore, λ max of JS in doped film showed blue-shift compared with FTC which exhibited a promising potential for tackling nonlinearity and transparency trade-off in second-order nonlinear optical (NLO) materials.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 61
·期 3
·662-668
·
IF 1.917
Jinghu Chen,Lingchang Jiang,Chengyun Li,Wenying Fu,Qineng Xia,Yangang Wang,Yuandong Huang
Light hydrocarbon separation is a crucial process associated with high energy expenditure in the petrochemical industry. The utilization of porous organic materials as solid porous adsorbents for light hydrocarbon separation has found widespread attention because of the advantages of low cost, excellent stability, and good recyclability. Here, we present the facile synthesis of a porous organic material, constructed from pyridine-triphenylborane by using a Friedel-Crafts alkylation coupling reaction, affording the hyper-cross-linked polymer, HCP-B. HCP-B features significant thermal stability, and high surface area. Gas adsorption experiments show that this material adsorbs much larger amounts of ethane, ethylene, and acetylene than that of methane. Ideal adsorbed solution theory (IAST) calculations also predict that HCP-B selectively adsorbs ethane, ethylene, and acetylene over methane. Both are indicative of the great potential of HCP-B in light hydrocarbon separation.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
·
IF 4.551
Huiyan Li,Gaimei Wang,Kok-Giap Haw,Jialu Li,Huazhen Rong,Hao Ren,Yongyan Deng,Ye Yuan,Guangshan Zhu,Xiaoqin Zou
Xenon is found a wide range of applications in our modern life, and its purification and separation is of paramount importance in industry. For this goal, we have synthesized several porous organic frameworks (POFs) from the perspective of pore chemistry. The prepared materials (CTF-0, PAF-45, PAF-67) show almost identical pore size of ~5.0 Å, appreciable surface areas (528.4–1158.5 m 2 g −1 ), substantial micropore volumes (0.158–0.3 cm 3 g −1 ) and high stabilities (400–600 °C). Adsorption measurements demonstrate that the prepared materials have xenon uptakes in the range of 25.2–62.8 cm 3 g −1 at 1.0 bar and 298 K, and Henry predictions reveal that they are selective for separating xenon from krypton with selectivities of 5.2–8.1. As a representative material, PAF-45 has been tested for xenon separation by the breakthrough experiment, and selectivity of 12.3 for xenon over krypton and xenon capacity of 92.4 mmol kg −1 are obtained.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2022
·Vol. 6
·期 7
·2200455
·
IF 15.367
Hang Zhang,Yun Gao,Mingzhe Chen,Lin Li,Li Li,Yun Qiao,Weijie Li,Jiazhao Wang,Shu-Lei Chou
Organic materials have attracted much attention in sodium ion batteries (SIBs) because of their advantages such as being environmentally benign and having high designability. Capacities and cycle life of organic materials are the most important parameters in most research which has been paid much effort to obtain an impressive electrochemical performance on the material level, and the sodium-detachable ability of these materials to directly match with the sodium-free anode is neglected. In this work, one organic sodium salt (C 6 H 2 Na 2 O 6 ) exhibits the unique ability (charging first in half cell) unlike other reported organic cathode materials (normally discharging first) for SIBs. The redox mechanism and structure change are investigated by in situ and ex situ tests to give a better understanding for C 6 H 2 Na 2 O 6 . Satisfying electrochemical performance (74% capacity retention after 600 cycles at 0.05 A g −1 and 63% capacity retention at 5 A g −1 when compared with capacity at 0.05 A g −1 ) is achieved by the C 6 H 2 Na 2 O 6 electrode. In addition, matched with hard carbon, full cells are assembled successfully like other transition metal containing cathode materials because C 6 H 2 Na 2 O 6 electrode can deliver its sodium ions to a sodium-free anode directly without any presodiation.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 7
·2203889
·
IF 15.1
Xiaobing Yan,Ying Zhao,Gang Cao,Xiaoyu Li,Chao Gao,Luan Liu,Shakeel Ahmed,Faizah Altaf,Hui Tan,Xiaopeng Ma,Zhongjian Xie,Han Zhang
In the past few decades, 2D layer materials have gradually become a central focus in materials science owing to their uniquely layered structural qualities and good optoelectronic properties. However, in the development of 2D materials, several disadvantages, such as limited types of materials and the inability to synthesize large-scale materials, severely confine their application. Therefore, further exploration of new materials and preparation methods is necessary to meet technological developmental needs. Organic molecular materials have the advantage of being customizable. Therefore, if organic molecular and 2D materials are combined, the resulting 2D organic materials would have excellent optical and electrical properties. In addition, through this combination, the free design and large-scale synthesis of 2D materials can be realized in principle. Furthermore, 2D organic materials exhibit excellent properties and unique functionalities along with great potential for developing sensors, biomedicine, and electronics. In this review, 2D organic materials are divided into five categories. The preparation methods and material properties of each class of materials are also described in detail. Notably, to comprehensively understand each material's advantages, the latest research applications for each material are presented in detail and summarized. Finally, the future development and application prospects of 2D organic materials are briefly discussed.
研究领域:
材料科学
·
有机化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）