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1. Reversible Photodriven Droplet Motion on Ti₃C₂ MXene Film for Diverse Liquids

Author:
Yu, Jiangping; Lao, Junchao; Chu, Dandan; Wang, Donghong; Tang, Ding; Li, Dayong; Zhu, Guoliang; Dong, Anping; Shu, Da; Peng, Yinghong; Luo, Jiayan; Sun, Baode
Source:
ACS applied materials & interfaces 2020 v.12 no.16 pp. 19194-19200
ISSN:
1944-8252
Subject:
lighting,   etc   ; droplets; heat; liquids; wettability;     Show all 5 Subjects
Abstract:
... The manipulation of liquid droplets on a specific surface with reversible wettability is of great importance for various applications from science to industry. Herein, the concept of a smart, flexible photodriven droplet motion (PDM) device with programmable wettability is designed using the 2D material of MXene film. Because of the MXene photothermal property, the Vaseline layer in the device is ...
DOI:
10.1021/acsami.0c01632

2. Path-Guided Hierarchical Surface Relief Gratings on Azo-Films Induced by Polarized Light Illumination through Surface-Wrinkling Phase Mask

Author:
Zhao, Xiaoxin; Wang, Juanjuan; Huang, Jinkai; Li, Lele; Liu, Enping; Zhao, Jingxin; Li, Qifeng; Zhang, Xin; Lu, Conghua
Source:
Langmuir 2020 v.36 no.11 pp. 2837-2846
ISSN:
1520-5827
Subject:
lighting,   etc   ; microstructure; polarized light; wavelengths;     Show all 4 Subjects
Abstract:
... Surface relief gratings (SRGs) with hierarchical microstructures are highly needed owing to their diverse applications in various fields. Here, we introduce surface-wrinkling templates as novel nonlithographic phase masks to direct the generation of hierarchical well-prescribed SRGs on nonconformally contacted azo-films by a simple single-beam illumination. The light-induced SRGs have controlled m ...
DOI:
10.1021/acs.langmuir.0c00089

3. Using headlight patterns in vehicle recognition

Author:
Finkelstein, Nir; Chaikovsky, Alan; Cohen, Yaron; Tsach, Tsadok
Source:
Forensic science international 2020 v.307 pp. 110120
ISSN:
0379-0738
Subject:
lighting,   etc   ; crime; models; vehicles (equipment);     Show all 4 Subjects
Abstract:
... Crime scenes are frequently poorly lit, making it difficult to recognize and identify implicated vehicles that have been caught on film or photographed during incidents. This paper explores vehicle recognition capabilities in dark images, specifically as when a vehicle’s headlights are on and are projecting light onto a flat vertical surface.In this study, the headlight reflection patterns of 68 v ...
DOI:
10.1016/j.forsciint.2019.110120

4. Ultrawide Band Gap Oxide Nanodots (Eg > 4.8 eV) for a High-Performance Deep Ultraviolet Photovoltaic Detector

Author:
Kan, Hao; Zheng, Wei; Fu, Chen; Lin, Richeng; Luo, Jingting; Huang, Feng
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 6030-6036
ISSN:
1944-8252
Subject:
lighting,   etc   ; detectors; gallium; manufacturing; nanotechnology;     Show all 5 Subjects
Abstract:
... Recently, deep ultraviolet (DUV) detectors based on gallium oxide (Ga₂O₃) have become promising in industrial and aerospace applications because of their inherently ultrawide band gaps (4.5–4.9 eV). Because most of them are difficult to be prepared, the lattice mismatch with the substrate and the expensive cost have to be taken into consideration. Because of such problems, the solution-processible ...
DOI:
10.1021/acsami.9b17679

5. Highly efficient inverted hole-transport-layer-free perovskite solar cells

Author:
Zhou, Zhongmin; Pang, Shuping
Source:
Journal of materials chemistry A 2020 v.8 no.2 pp. 503-512
ISSN:
2050-7496
Subject:
lighting,   etc   ; chemistry; commercialization; solar cells;     Show all 4 Subjects
Abstract:
... In the past ten years, perovskite solar cells (PSCs) have achieved tremendous success, with the efficiency rivalling that of conventional silicon-based devices. To promote commercialization, lowering the production cost and reducing the complexity of the process would make the devices more competitive and thus are highly required. In this respect, inverted hole-transport-layer-free (HTL-free) PSCs ...
DOI:
10.1039/c9ta10694d

6. A deep-level region-based visual representation architecture for detecting strawberry flowers in an outdoor field

Author:
Lin, P.; Lee, W. S.; Chen, Y. M.; Peres, N.; Fraisse, C.
Source:
Precision agriculture 2020 v.21 no.2 pp. 387-402
ISSN:
1385-2256
Subject:
lighting,   etc   ; cameras; flowers; fruit yield; models; strawberries;     Show all 6 Subjects
Abstract:
... An accurate and robust strawberry flower representation and detection scheme is a key step to enable the reliable forecasting of fruit yield for use in precision agricultural applications. A state-of-the-art deep-level object detection framework which processes images through several layers using a region-based convolutional neural network (R-CNN) was developed to visually represent the instances ...
DOI:
10.1007/s11119-019-09673-7

7. Thioalkyl-Functionalized Bithiophene (SBT)-Based Organic Sensitizers for High-Performance Dye-Sensitized Solar Cells

Author:
Ezhumalai, Yamuna; Lin, Fang-Sian; Fan, Miao-Syuan; Prabakaran, Kumaresan; Ni, Jen-Shyang; Wu, Yi-Ching; Lee, Gene-Hsiang; Chen, Ming-Chou; Ho, Kuo-Chuan
Source:
ACS applied materials & interfaces 2020 v.12 no.13 pp. 15071-15079
ISSN:
1944-8252
Subject:
lighting,   etc   ; dyes; electrochemistry; solar cells; thiophene;     Show all 5 Subjects
Abstract:
... A series of 3,3′-dithioalkyl-2,2′-bithiophene (SBT)-based organic chromophores were designed and developed for the use in dye-sensitized solar cells (DSSCs). By appropriate structural modification of the SBT π-linkers with different alkyl chains and conjugated thiophene units, chromophore aggregation and interfacial charge recombination could be suppressed to a remarkable degree. Single-crystal an ...
DOI:
10.1021/acsami.9b21955

8. Combinational Approach To Realize Highly Efficient Light-Emitting Electrochemical Cells

Author:
Yi, Rong-Huei; Lo, Chieh-Liang; Luo, Dian; Lin, Chien-Hsiang; Weng, Shu-Wen; Lu, Chin-Wei; Liu, Shun-Wei; Chang, Chih-Hao; Su, Hai-Ching
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 14254-14264
ISSN:
1944-8252
Subject:
lighting,   etc   ; cathodes; electrochemistry; glass; indium tin oxide;     Show all 5 Subjects
Abstract:
... Light-emitting electrochemical cells (LECs) show high technical potential for display and lighting utilizations owing to the superior properties of solution processability, low operation voltage, and employing inert cathodes. For maximizing the device efficiency, three approaches including development of efficient emissive materials, optimizing the carrier balance, and maximizing the light extract ...
DOI:
10.1021/acsami.9b23300

9. Characteristics of a zoomable Fresnel lens (ZFL) used for solar concentration

Author:
Ma, Xinglong; Liang, Shen; Jin, Rihui; Zheng, Hongfei
Source:
Energy 2020 v.194 pp. 116698
ISSN:
0360-5442
Subject:
lighting,   etc   ; angle of incidence; deformation; energy;     Show all 4 Subjects
Abstract:
... This paper presents a zoomable Fresnel lens (ZFL) approaching to use tensile deformation to solve the problem of the focal length’s shortening during the tilt solar incidence. A sample of ZFL with width of 95 mm and focal length of 240 mm was design and analyzed. It is found that the focal length would increase by 75% when the width of the ZFL is elongated by 30% and the variation is linear. The f ...
DOI:
10.1016/j.energy.2019.116698

10. Rapid high resolution 3D imaging of expanded biological specimens with lattice light sheet microscopy

Author:
Tsai, Yun-Chi; Tang, Wei-Chun; Low, Christine Siok Lan; Liu, Yen-Ting; Wu, Jyun-Sian; Lee, Po-Yi; Chen, Lindsay Quinn; Lin, Yi-Ling; Kanchanawong, Pakorn; Gao, Liang; Chen, Bi-Chang
Source:
Methods 2020 v.174 pp. 11-19
ISSN:
1046-2023
Subject:
lighting,   etc   ; image analysis; isotropy; microscopes; microscopy; polymers;     Show all 6 Subjects
Abstract:
... Expansion microscopy was invented to surpass the optical diffraction limit by physically expanding biological specimens with swellable polymers. Due to the large sizes of expanded specimens, 3D imaging techniques that are capable to acquire large volumetric data rapidly at high spatial resolution are therefore required for expansion microscopy. Lattice light sheet microscopy (LLSM) was developed t ...
DOI:
10.1016/j.ymeth.2019.04.006

11. Tetraethylenepent-MAPbI₃–ₓClₓ Unsymmetrical Structure-Enhanced Stability and Power Conversion Efficiency in Perovskite Solar Cells

Author:
Huang, Jin; Zhang, Dan; Ding, Lei; Gao, Changji; Zhang, Fanghui
Source:
ACS applied materials & interfaces 2020 v.12 no.9 pp. 11224-11231
ISSN:
1944-8252
Subject:
lighting,   etc   ; cations; halogens; solar cells; solar energy;     Show all 5 Subjects
Abstract:
... Two-dimensional (2D) perovskite solar cell (PSC) can achieve high stability by alternating interface cations. However, its main transmissive charge is limited owing to the 2D structure. Therefore, compared with a 3D device, the 2D PSC has poor power conversion efficiency (PCE). Further enhanced performance will require an increase in the transmission dimension of 2D PSC. Here, a novel tetraethylen ...
DOI:
10.1021/acsami.9b22627

12. Improving the Electroluminescent Performance of Blue Light-Emitting Polymers by Side-Chain Modification

Author:
Peng, Feng; Zhong, Wenkai; Zhong, Zhiming; Guo, Ting; Ying, Lei
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8495-8502
ISSN:
1944-8252
Subject:
lighting,   etc   ; moieties; molecular conformation; polymers; refractive index;     Show all 5 Subjects
Abstract:
... Blue light-emitting polymers are in urgent demand for new-generation display and solid-state lighting devices fabricated through low-cost wet processing. However, their current performances are far from satisfactory. Here, we developed a series of poly(fluorene-co-dibenzothiophene-S,S-dioxides) (PFSOs) bearing different alkyl chains, alkoxyphenyl chains, or both alkylaryl and alkoxyphenyl side cha ...
DOI:
10.1021/acsami.9b21652

13. Fast Response Characteristics of Flexible Ultraviolet Photosensors with GaN Nanowires and Graphene

Author:
Han, Sangmoon; Choi, Ilgyu; Lee, Cheul-Ro; Jeong, Kwang-Un; Lee, Seoung-Ki; Kim, Jin Soo
Source:
ACS applied materials & interfaces 2019 v.12 no.1 pp. 970-979
ISSN:
1944-8252
Subject:
lighting,   etc   ; graphene; nanowires;     Show all 3 Subjects
Abstract:
... We report the fast response characteristics of flexible ultraviolet photosensors with GaN nanowires (NWs) and a graphene channel. The GaN NWs used as light-absorbing media are horizontally and randomly embedded in a graphene sandwich structure in which the number of bottom graphene layers is varied from zero to three and the top is a fixed single layer of graphene. In the response curve of the pho ...
DOI:
10.1021/acsami.9b13109

14. Spatial layouts and absorbing surface design of heater tube arrays of direct-illumination receiver used in high power dish/stirling system

Author:
Liu, Fanmao; Wu, Ke; Rao, Zaixing; Peng, Youduo
Source:
Energy 2019 v.188 pp. 116026
ISSN:
0360-5442
Subject:
lighting,   etc   ; absorptivity; geometry; heat;     Show all 4 Subjects
Abstract:
... The spatial layout and absorbing surface of heater tubes of receiver has a significant impact on its optical performance. In this paper, the generating method for centerline of heat tubes based on the circular involute projection on three space surfaces such as conical frustrum, hyperboloid of one sheet and paraboloid of revolution (which is defined as type I, type II and type III, respectively) i ...
DOI:
10.1016/j.energy.2019.116026

15. Au–PbS core–shell nanorods for plasmon-enhanced near-infrared photodetection

Author:
Zhao, Xinhong; Duan, Yongsheng; Li, Kai; Fang, Yongchu; Song, Xiaoxian; Zhang, Haiting; Yu, Huaqing
Source:
Journal of materials science 2019 v.54 no.24 pp. 14720-14727
ISSN:
0022-2461
Subject:
lighting,   etc   ; metals; nanorods; semiconductors;     Show all 4 Subjects
Abstract:
... Plasmonic metals possess the ability to enhance the interaction between light and matter, which has been widely used in optoelectronic devices, especially, a direct contact is established between metal and semiconductor in hetero-nanostructure. In this work, we report an enhanced photodetector by surface plasmon, which is based on Au–PbS core–shell nanorod phototransistor. The photodetector achiev ...
DOI:
10.1007/s10853-019-03920-y

16. A segmentation method for disease spot images incorporating chrominance in Comprehensive Color Feature and Region Growing

Author:
Jothiaruna, N.; Joseph Abraham Sundar, K.; Karthikeyan, B.
Source:
Computers and electronics in agriculture 2019
ISSN:
0168-1699
Subject:
lighting,   etc   ; color; leaves; seeds;     Show all 4 Subjects
Abstract:
... In this research work, a segmentation method for disease spotted leaves using Advanced Comprehensive Color Feature (ACCF) and Region Growing method captured under real field condition is proposed. The captured diseased leaves have two main challenges one is clutter background and then uneven illumination, this issue makes the robust segmentation lower. Two methods namely Advanced Comprehensive Col ...
DOI:
10.1016/j.compag.2019.104934

17. High-Efficiency Metalenses with Switchable Functionalities in Microwave Region

Author:
Zhang, Kuang; Yuan, Yueyi; Ding, Xumin; Ratni, Badreddine; Burokur, Shah Nawaz; Wu, Qun
Source:
ACS applied materials & interfaces 2019 v.11 no.31 pp. 28423-28430
ISSN:
1944-8252
Subject:
lighting,   etc   ; communications technology; geometry;     Show all 3 Subjects
Abstract:
... Regarding miniaturized and integrated systems, a single flat device that possesses diversified functionalities is highly desirable in optical to microwave regimes. With this perspective, bifunctional metalenses constructed by meta-atoms with integrated response to propagation phase and geometric phase are proposed for independent manipulation of right-handed and left-handed circularly polarized wa ...
DOI:
10.1021/acsami.9b07102

18. A glassware-free combinatorial synthesis of green quantum dots using bubble wrap

Author:
Mann, P. Bergstrom; Afzal, K.; Long, N. J.; Thanou, M.; Green, M.
Source:
RSC advances 2019 v.9 no.29 pp. 16851-16855
ISSN:
2046-2069
Subject:
lighting,   etc   ; quantum dots; synthesis;     Show all 3 Subjects
Abstract:
... Here, we describe the use of commercially-available bubble wrap as the basis for the simple, cheap combinatorial exploration of the synthesis of brightly emitting core/shell quantum dots. ...
DOI:
10.1039/c9ra02018g

19. Perovskites for Next-Generation Optical Sources

Author:
Quan, Li Na; Rand, Barry P.; Friend, Richard H.; Mhaisalkar, Subodh Gautam; Lee, Tae-Woo; Sargent, Edward H.
Source:
Chemical reviews 2019 v.119 no.12 pp. 7444-7477
ISSN:
1520-6890
Subject:
lighting,   etc   ; color; luminescence;     Show all 3 Subjects
Abstract:
... Next-generation displays and lighting technologies require efficient optical sources that combine brightness, color purity, stability, substrate flexibility. Metal halide perovskites have potential use in a wide range of applications, for they possess excellent charge transport, bandgap tunability and, in the most promising recent optical source materials, intense and efficient luminescence. This ...
DOI:
10.1021/acs.chemrev.9b00107

20. Light-induced shape morphing of thin films

Author:
Kuenstler, Alexa S.; Hayward, Ryan C.
Source:
Current opinion in colloid & interface science 2019 v.40 pp. 70-86
ISSN:
1359-0294
Subject:
lighting,   etc   ; deformation; optics; photochemistry;     Show all 4 Subjects
Abstract:
... Shape transformation of thin two-dimensional sheets into three-dimensional structures using light is of great interest for remotely controlled fabrication, surface modulation, and actuation. Over the last few decades, significant efforts have been made to develop material systems incorporating photochemical or photothermal elements to drive deformation in response to illumination. However, the ful ...
DOI:
10.1016/j.cocis.2019.01.009