APPLIED OPTICS
·
2019
·Vol. 58
·期 18
·4926-4932
·
IF 1.973
Yuxiao Hou,Xiaohong Li,Hang Luo,Wei Lei,Hong Lei
We theoretically simulate the antireflective effects of oxide nanosphere monolayer films in the visible spectrum. The essential geometric and material parameters of nanosphere films are simulated and different functions are proposed to describe the dependence of reflectance on the influencing factors. The rational function is fitted to describe the monotonic decreasing of reflectance on the ratio of nanospheres’ radius to incident wavelength. At a wavelength of 550 nm and incidence at 75°, the reflectance of the glass substrate coated with SiO2 decreases to 14.1% compared with 41.7% of the uncoated glass. The results have an excellent potential for applications in optical devices such as filters, polarizing elements, and camera lenses.
研究领域:
光学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Soft Matter
·
2025
·
IF 2.8
Manas Kumar Mandal,Shujiao Chen,Shuai Zhang,Qunhui Yuan,Wei Gan
Biocompatible and bioavailable ionic liquids (ILs) are generally used to modify the physicochemical properties of lipid monolayers and bilayers. Understanding the influence of ILs on lipid properties and the molecular level mechanism is crucial for applying ILs in lipid membrane modifications. Here the modification of a lipid membrane composed of 1,2-dioleoyl-sn-glycero-3-phosphoglycerol (DOPG) and cholesterol using alkyl methyl imidazolium-based ILs [Cnmim]Cl with varied alkyl chains (n = 4, 6, 8 and 10) was investigated. Langmuir monolayers were used to evaluate the influence of the ILs on the rigidity and robustness of the membranes. Then, selected compositions were used to prepare small unilamellar vesicles (SUVs) as nanocarriers. A small amphiphilic molecule (4-(4-diethylaminostyry)-1-methyl-pyridinium iodide, D289) was used as a probe to investigate the loading capability and encapsulation efficiency of the SUVs. The permeability of the lipid membrane to small molecules was also evaluated using second harmonic generation spectroscopy analysis. The different effects of the ILs with increasing chain length imposed on the membranes were compared and analyzed.
研究领域:
生物物理学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Advances
·
2021
·Vol. 7
·期 52
·
IF 14.143
Liping Song,Ben Bin Xu,Qian Cheng,Xiaoyuan Wang,Xiaoning Luo,Xue Chen,Tao Chen,Youju Huang
Thin film fabrication is of great importance in modern engineering. Here, we propose a universal and conformal thin film technique enabled by the wetting empowered interfacial self-assembly. By tailoring the contact angle of nanoparticle (NP), a NP monolayer can be assembled instantly (within 5 seconds) with an excellent harvesting efficiency (up to 97.5 weight %). This self-assembly strategy presents a universal applicability on various materials, e.g., nonmetal, metal, and core-shell structures, and can achieve a monolayer with same in-plane area as a 95 cm2 wafer in a single process, indicating great potential for scale-up manufacturing. Through a template transfer, we coat the surface of different substrates (plastic, paper, etc.) with the assembled film in a conformal and nondestructive “lift-on” manner and subsequently demonstrate fluorescent micropatterns. This self-assembly strategy has great implications in advancing thin film technology in a user-friendly and cost-effective fashion for applications in anti-counterfeiting, actuators, and wearable/flexible electronics.
研究领域:
材料科学
·
纳米技术
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 4
·045502
·
IF 3.3
Lingling Zhang,Shuangru Yang,Yuge Liu,Yongmei Jia,Zhiguo Li
Understanding the electron transfer performance of DNA self-assembled monolayers (SAMs) on a transducer substrate was important for constructing DNA electrochemical sensors with high sensitivity. Here we immersed the gold electrodes in mixed solutions comprising thiol-modified stem-loop DNA (SL-DNA) or linear DNA (L-DNA) terminally bound with methylene blue (MB), and aliphatic thiols (HOC6SH, C6SH, HOOCC5SH, H2NC6SH, HOC11SH, C12SH, or HOOCC10SH) to obtain DNA/thiols mixed self-assembled monolayers (SAMs). MB electron transfer performances through SL-DNA/thiols and L-DNA/thiols mixed SAMs were investigated by cyclic voltammetry (CV). Our results showed that the mixed assembly of thiols with DNA was conducive to MB electron transfer. The electron transfer rate (ks) values of MB through L-DNA SAMs were bigger than those through SL-DNA SAMs, indicating that the flexibility of DNA chains was important to MB electron transfer. Thiols chain length or terminal groups influenced ks of MB significantly, that increasing NaCl or MgCl2 concentrations in solution around DNA availed MB electron transfer, and Mg2+ advanced MB electron transfer more than Na+, and that the stability of L-DNA/thiols SAMs was much better than SL-DNA/thiols SAMs. These conclusions might provide a reference for studying DNA electron transfer mechanisms or designing DNA or RNA electrochemical sensors with optimal performance.
研究领域:
生物化学
·
电化学传感器
·
分子生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2012
·Vol. 12
·期 3
·2049-2053
·
IF 1.563
Ren Qiaoqiao,He Jingjing,Wang Huihui,Xu Shanling,Wang Zhigang,Miao Yuqing
The self-assembly of nanomaterials into ordered two- or three-dimensional structures has been extensively explored over the past years due to the great application potential. This paper reports a simple one-step methodology for the synthesis and assembly of Prussian blue/polypyrrole
(PBPPy) nanocomposites into close-packed monolayer at a toluene-water interface where the formation of PBPPy and evaporation of organic phase happen simultaneously. The formed films could be easily transferred onto the glass carbon surface by layer-by-layer technique. The obtained PBPPy nanocomposites
and their assembled film were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, UV-vis spectroscopy and cyclic voltammetry. The PBPPy nanocomposite film on the electrode surface exhibits excellent electron transfer and high electro-catalysis toward the
reduction of H2O2. Herein, PPy component in PBPPy nanocomposites plays a great role in this great electrochemical performance. On the one hand, the presence of PPy is helpful of the formation of close-packed monolayer of PBPPy nanocomposites, and the adhesion of the ordered
monolayer or multilayer onto the electrode surface due to the molecular interaction of PPy or the surface group of electrode. On the other hand, the conductive PPy facilitates the electron transfer between PB and PB or PB and electrode. The suggested method can be extended to a wide range
of nanomaterials assembly and devise development.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2020
·Vol. 8
·期 18
·1902082
·
IF 8.286
Liping Song,Nianxiang Qiu,Youju Huang,Qian Cheng,Yanping Yang,Han Lin,Fengmei Su,Tao Chen
Constructing 2D gold nanorods monolayer films with precise particle assembly is of great importance to fundamental and real applications. However, it is usually difficult to achieve macroscopic size, freestanding feature, high density of particle packing, and precisely controllable particle orientation in monolayer films. In this work, a macroscopic, uniform, freestanding orientational monolayer film is facilely and controllably prepared through precise assembly of asymmetrically modified gold nanorods at water–oil interface. The assembling morphologies can be controlled through regulating the interaction between gold nanorods by varying the amounts and sites of modified molecules. The intriguing tunable assemblies exhibit not only adjustable absorption spectrum in a wide range attributed to different particle coupling, but also optimized photothermal conversion capability under low energy density (0.08 W cm -2 ). Together with a commercial thermochromic dye, the patterned assemblies show excellent photothermal anti-counterfeiting performance by reproducing accurate full images in 20 s that are invisible after laser off in 10 min. The excellent laser writing performance is also demonstrated by writing any information on thermochromic dye-coated assemblies. With the advantages of being macroscopic, equipment-free, transferable, scalable and with high photothermal conversion capability, the orientational monolayer films pave the way for on-demand design of sensing and device applications.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Yu Liu,Li Chen,Shaohong Li,Zejiang Gao,Yuping Pang,Bingsuo Zou
Metal halide perovskites have emerged as promising candidates for self-powered photodetectors due to their exceptional optoelectronic properties, including low exciton binding energies, high absorption coefficients, superior charge transport properties, and solution processability. However, the inherent high dark current in perovskite-based devices remains a fundamental limitation to their performance. In this study, we present an interface engineering strategy to overcome this challenge by incorporating a self-assembled monolayer (SAM) between the TiOx electron transport layer and the CsPbBr3 perovskite quantum dot film. Comprehensive experimental analysis indicates that the SAM layer performs a critical dual function: it effectively blocks interfacial electron injection as a charge barrier and promotes higher quality perovskite films through crystallinity optimization and defect passivation, ultimately suppressing non-radiative recombination. This synergistic effect results in a reduction of dark current to an ultralow value of 2.13 × 10−10 A. The optimized photodetector exhibits high-performance metrics at zero bias under 365 nm illumination, achieving an outstanding on/off ratio of 7.6 × 106, a high specific detectivity of 2.74 × 1012 Jones, and an extensive linear dynamic range of 137.7 dB. Furthermore, the device demonstrates exceptional environmental stability, maintaining 91.8% of its initial efficiency after 120 days of storage in a nitrogen atmosphere without encapsulation. This work establishes a universal approach for defect suppression in perovskite optoelectronics, with potential applications extending to solar cells, light-emitting diodes, and radiation detectors.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
AIP Advances
·
2019
·Vol. 9
·期 12
·
IF 1.579
Fu Jing,Chen Kaixiang,Chang Shannan,Zhi Kanru,Gao Xuejiao,Wei Hao,Dan Yaping
Self-assembled molecular monolayer doping is an emerging doping technique. In this work, we investigated the activation rate and photoresponses of boron doped silicon by self-assembled molecular monolayer doping. By using low temperature Hall effect measurements and by secondary ion mass spectroscopy, we find that the activation rate of boron in these samples is in the range of 91%–54%, depending on the doping concentration. Interestingly, the photoresponsivity of the boron doped samples is also significantly higher than that of the phosphorus doped samples even though the same doping technique is used. The intriguing photoresponses are closely related to the trapping of photogenerated minority carriers by the defects in the p -type silicon.
研究领域:
材料科学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Xinshun Qin,Muhammad Umair Ali,Hongbo Mo,Zhengtian Yuan,Yanling He,Alan Man Ching Ng,Aleksandra B. Djurišić
Perovskite light-emitting diodes (LEDs) with different self-assembled monolayers (SAMs), namely 2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz), [4-(3,6-dimethyl-9H-carbazol- 9-yl)butyl] phosphonic acid (Me-4PACz), and [2-(3,6-Dichloro-9H-carbazol-9-yl)ethyl]phosphonic acid (Cl-2PACz), have been investigated. We find that the underlying SAM affects the perovskite morphology despite the use of poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(4,4′-(N-(4-butylphen-yl)))] (TFB) hole transport layer between the SAM and the perovskite. Despite similar device performance in terms of maximum luminance and external quantum efficiency, the devices exhibit significant differences in lifetime which correlate with perovskite thin film morphology. We show that significant roughness is detrimental to the device stability. The devices with 2PACz SAM, which exhibit the most favorable film morphology, exhibit T 50 lifetime of 1.43 h.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2013
·
IF 4.425
Wanzhen Li,Bin Su
Herein we report the nontrivial effect of counterion size on the electrochemical charging of gold nanoparticle (or called MPC) monolayer films in aqueous electrolyte solutions. The electrochemical charging response was observed with relatively small counterions (e.g., BF 4 − , ClO 4 − and PF 6 − ) but not large ones like bis(trifluoromethylsulfonyl)amide (Tf 2 N − ), tetrakis(pentafluorophenyl)borate (TB − ) or bis(triphenylphosphoranylidene) (BA + ). This effect was explained by the proximity of counterions to the MPC surface, which determines whether the electronic charges on MPCs can be effectively compensated by formation of ion pairs . Only small counterions are permitted to approach the MPC surface by permeating the alkanethiolate layer to achieve a sufficient charge compensation. In contrast, big ions are sterically excluded and thus disfavor the electrochemical charging. This finding helps in further understanding the ion-coupled electrochemical charging mechanism of nanoparticle films.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2020
·Vol. 74
·期 11
·4125-4133
·
IF 1.68
Wang Faqiang,Chen Lei,Xu Dong,Li Zhanxiong
Tetrafluoro-λ 6 -sulfanyl (–SF 4 –) was synthesized via oxidative fluorination and used as a bridging group to bond perfluoroalkyl to phenylene. As a result, perfluoroalkylphenyltrichlorosilane was prepared by hydrosilylation using perfluoroalkylstyrene as a raw material under platinum catalytic conditions. And the corresponding monolayers produced a coating on silicon surfaces by spontaneous self-assembly from solution. Due to the introduction of –SF 4 –, it can increase the shielding effect of the fluoroalkyl group and reduce the surface energy of the material on the basis of extending the length of the perfluoroalkyl chain. At the same time, the sulfur–carbon bond formed by the bridge group is more likely to decrease under ultraviolet light. Once the bridge bond is broken, the perfluoroalkyl-terminated carbon chain perfluoroalkyl group is decomposed and detached. Therefore, the fluorine-containing material has good ultraviolet light degradation property, and the obtained fluorine-containing material is environmentally friendly. The self-assembled film containing a perfluoroalkylsilane can effectively reduce the friction properties and adhesion of the substrate, and the substrate modified with the self-assembled film containing a perfluoroalkylsilane has good stability.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2017
·
IF 2.221
Ruoping Li,Jingliang Yang,Junhe Han,Junhui Liu,Mingju Huang
A Raman method employing silver nanoparticle (Ag NP) monolayer film as Surface-enhanced Raman Scattering (SERS) substrate was presented to rapidly detect melamine in milk. The Ag NPs with 80 nm diameter were modified by polyvinylpyrrolidone to improve their uniformity and chemical stability. The treatment procedure of liquid milk required only addition of acetic acid and centrifugation, and required time is less than 15 min. The Ag NP monolayer film significantly enhanced Raman signal from melamine and allowed experimentally reproducible determination of the melamine concentration. A good linear relationship (R 2 =0.994) between the concentration and Raman peak intensity of melamine at 681 cm −1 was obtained for melamine concentrations between 0.10 mg L −1 and 5.00 mg L −1 . This implies that this method can detect melamine concentrations below 1.0 mg L −1 , the concentration currently considered unsafe.
研究领域:
食品安全
·
分析化学
✓ 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）