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Molecular and Nano Machines IV最新文献

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Diluting monolayers in molecular diodes to enhance their electrical properties 稀释分子二极管中的单层以提高其电性能
Molecular and Nano Machines IV Pub Date : 2021-08-04 DOI: 10.1117/12.2593853
R. Sullivan, O. Jurchescu, M. Welker, J. T. Morningstar
{"title":"Diluting monolayers in molecular diodes to enhance their electrical properties","authors":"R. Sullivan, O. Jurchescu, M. Welker, J. T. Morningstar","doi":"10.1117/12.2593853","DOIUrl":"https://doi.org/10.1117/12.2593853","url":null,"abstract":"We report on the electrical properties of a series of molecular rectifiers based on benzalkylsilane molecules in self-assembled monolayers (SAMs) anchored to silicon substrates with a native layer of SiO2. Mixed SAMs were formed via co-absorption where known amounts of aliphatic silane-based impurities were included into the rectifying SAMs. We discovered that in spite of the fact that the degree of order within the SAMs decreased upon dilution the impurity (3-aminopropyl)triethoxysilane enhanced the rectification for several SAMs. The largest change resulted in a three-fold increase for an average rectification of 4500; the highest reported rectification for SAMs assembled on silicon to date. We attribute this novel behavior to a new molecular configuration within the SAM that allows more efficient coupling between the delocalized electrons of the SAM and the device electrode. Understanding how to optimize SAMs will allow for more functionable, integrable and cost-efficient devices.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116896256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Harnessing the power of light with photomechanical materials 利用光刻材料来利用光的力量
Molecular and Nano Machines IV Pub Date : 2021-08-02 DOI: 10.1117/12.2596475
M. Kuzyk
{"title":"Harnessing the power of light with photomechanical materials","authors":"M. Kuzyk","doi":"10.1117/12.2596475","DOIUrl":"https://doi.org/10.1117/12.2596475","url":null,"abstract":"We study the mechanisms of the photomechanical response of dye-doped polymers and liquid crystal elastomers by characterizing the stress/strain response function to modulated light of a variety of material compositions with the specific goal of optimizing the photomechanical response Figure of Merit (FOM), which quantifies the efficiency with which light energy is converted to mechanical work. We discuss experiments that vary the parameters, which define the FOM to study the underlying mechanisms. Large and dramatic length changes and bending angles are commonly observed in materials with a small Young’s modulus even when the light-induced stress is small. However, useful devices require large forces, which may not always lead to large displacements in stiff materials. We use the concept of a photomorphon, the smallest photomechanical material element, to guide in the design of the most efficient materials and describe the photomechanical analog of the optical transistor.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126646853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancement of molecular orientation by surface enhanced visible absorption of dye molecules in the vicinity of gold nano-antennas 在金纳米天线附近通过表面增强染料分子的可见吸收来增强分子取向
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2595343
Z. Sekkat, S. Refki, S. Elhani
{"title":"Enhancement of molecular orientation by surface enhanced visible absorption of dye molecules in the vicinity of gold nano-antennas","authors":"Z. Sekkat, S. Refki, S. Elhani","doi":"10.1117/12.2595343","DOIUrl":"https://doi.org/10.1117/12.2595343","url":null,"abstract":"In this presentation, we discuss enhancement of photo-orientation of azo-dye in films of polymer by surface enhanced visible absorption (SEVA) of the dye in the vicinity of Gold nanoantennas. The dye undergoes shape and orientation change; i.e. isomerization and reorientation, upon polarized light absorption; and the observation of enhanced photo-orientation by SEVA is done by photo-induced birefringence (PIB) experiments, since the signal detected from PIB experiments is directly proportional to the extinction coefficient of the dye. Both the dye’s absorption and photoorientation are enhanced by the presence of the plasmonic nanoantennas.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115122356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fluorescence microscopy with optical sectioning based on varifocal metalens 基于变焦超透镜光学切片的荧光显微镜
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2595113
H. Kuo, C. H. Chu, S. Vyas, Yu-hsin Chia, Takuo Tanaka, Yu-Jung Lu, Yuan Luo, Yi-You Huang, D. Tsai
{"title":"Fluorescence microscopy with optical sectioning based on varifocal metalens","authors":"H. Kuo, C. H. Chu, S. Vyas, Yu-hsin Chia, Takuo Tanaka, Yu-Jung Lu, Yuan Luo, Yi-You Huang, D. Tsai","doi":"10.1117/12.2595113","DOIUrl":"https://doi.org/10.1117/12.2595113","url":null,"abstract":"The optical sectioning images of volumetric biological sample was obtained by varifocal metalens with Moire effect in fluorescence microscopy system in conjunction with telecentricity and HiLo image processing method. The varifocal metalens is capable of changing the focal depth ranging from 10 mm to 125 mm by tuning the relative angle between its paired metasurfaces. The standard resolution target and fluorescent mircrosphere are imaged and analyzed; its lateral resolution and optical sectioning capability are 2.46 μm and 7.5 μm, respectively. Our study offers a demonstration, a solid foundation, for developing more compact optical microscopy systems based on metasurface optics.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134465079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantitative surface bending strain analysis of flexible films by surface labeled grating method 用表面标记光栅法定量分析柔性薄膜的表面弯曲应变
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2595415
A. Shishido
{"title":"Quantitative surface bending strain analysis of flexible films by surface labeled grating method","authors":"A. Shishido","doi":"10.1117/12.2595415","DOIUrl":"https://doi.org/10.1117/12.2595415","url":null,"abstract":"Surface bending strains in various flexible films is quantitatively analyzed by a surface-labeled grating method with a single-nanometer resolution. The real-time strain analysis we achieved has multiple benefits: high resolution, precision, and a wide range of measurable materials. The reliability of the measurements was confirmed using the modified Elastica theory. This method revealed that the cracking of hard coatings on the surface of PET films occurred at surface strains exceeding 1.45%, regardless of the film thickness and curvature. The multilayering of two PET layers with a soft PDMS layer between them reduced the surface bending strain by 50% compared with that of a single-layer film with the same thickness. This triple-layer film successfully suppressed the cracking of the hard coating and the breakdown of the OTFT. The surface-labeled grating method, therefore, is a practical tool that allows the analysis of surface bending strain in the elaborately designed materials.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131696234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exotic surface reliefs of azopolymers with structured light fields with optical angular momentum 具有光学角动量的结构光场的偶氮聚合物的外来表面浮雕
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2594920
T. Omatsu
{"title":"Exotic surface reliefs of azopolymers with structured light fields with optical angular momentum","authors":"T. Omatsu","doi":"10.1117/12.2594920","DOIUrl":"https://doi.org/10.1117/12.2594920","url":null,"abstract":"","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132846365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonlinear interaction between optical vortex and cyanobacteria fragments in solution 溶液中光学涡旋与蓝藻碎片的非线性相互作用
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2594432
M. Matsumoto, Taiki Yoshizawa, K. Miyamoto, T. Omatsu
{"title":"Nonlinear interaction between optical vortex and cyanobacteria fragments in solution","authors":"M. Matsumoto, Taiki Yoshizawa, K. Miyamoto, T. Omatsu","doi":"10.1117/12.2594432","DOIUrl":"https://doi.org/10.1117/12.2594432","url":null,"abstract":"Optical forces generated by interaction between light and biomaterials induce an optical waveguide, leading to a deep penetration of light in a scattering suspension. \u0000In contrast, we report on the optical vortex induced exotic nonlinear phenomena not only the conventional self-trapping effects. \u0000A 532 nm continuous-wave right-/left-handed first-order optical vortex was focused to be an annular spot with a diameter of 40 um in cyanobacteria suspensions, where their nonlinearity was controlled by appropriately mixing seawater and glycerol. The incident optical vortex underwent strong self-defocusing effects in the suspensions with a high mixing ratio of glycerol, resulting in the creation of the dark soliton. \u0000The spatial symmetry breaking of the incident optical vortex further occurred in the moderate mixing ratio, manifesting the modal instability effects. Furthermore, the broken optical vortex then rotated towards a clockwise/anticlockwise direction assigned by its handedness.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114788805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Photonically propelled nano- and microparticles: From single-particle motion to collective dynamics 光子推进的纳米粒子和微粒子:从单粒子运动到集体动力学
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2598743
R. Wittkowski, Julian Jeggle, C. Denz
{"title":"Photonically propelled nano- and microparticles: From single-particle motion to collective dynamics","authors":"R. Wittkowski, Julian Jeggle, C. Denz","doi":"10.1117/12.2598743","DOIUrl":"https://doi.org/10.1117/12.2598743","url":null,"abstract":"Among the existing realizations of microscopic motile devices, photonically propelled nano- and microparticles are particularly advantageous. Their features pave the way for applying them in large numbers, e.g., as constituents of novel active materials with exceptional properties. However, the recently proposed photonically propelled particles have so far been studied only partially on the single-particle level so that their interesting collective dynamics remains unexplored. This talk will address this issue by presenting methods that allow to proceed from the single-particle motion of motile particles to their collective dynamics. It will focus on analytical modeling and computer simulations as well as their application to photonically propelled nano- and microparticles. Furthermore, it will present results, including unexpected pattern formation and transport effects, obtained by these methods for system sizes and particle numbers that are not yet accessible by experiments.","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"15 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127689856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optical characterization of ultra-thin films of dye doped polymers using ellipsometry and surface plasmon spectroscopy 利用椭圆偏振和表面等离子体光谱对染料掺杂聚合物超薄膜进行光学表征
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2595344
Z. Sekkat, N. Andam, S. Refki
{"title":"Optical characterization of ultra-thin films of dye doped polymers using ellipsometry and surface plasmon spectroscopy","authors":"Z. Sekkat, N. Andam, S. Refki","doi":"10.1117/12.2595344","DOIUrl":"https://doi.org/10.1117/12.2595344","url":null,"abstract":"","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125064959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optoplasmonic sensing of single enzyme molecules 单酶分子的光等离子体传感
Molecular and Nano Machines IV Pub Date : 2021-08-01 DOI: 10.1117/12.2594170
N. Toropov
{"title":"Optoplasmonic sensing of single enzyme molecules","authors":"N. Toropov","doi":"10.1117/12.2594170","DOIUrl":"https://doi.org/10.1117/12.2594170","url":null,"abstract":"","PeriodicalId":117063,"journal":{"name":"Molecular and Nano Machines IV","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114992028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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