首页 > 最新文献

Proceedings of Micromachines 2021 — 1st International Conference on Micromachines and Applications (ICMA2021)最新文献

英文 中文
Controlled Light-Driven Levitation of Macroscopic Plates 控制光驱动悬浮宏观板
Mohsen Azadi, G. Popov, Zhipeng Lu, Andy G. Eskenazi, A. Bang, M. Campbell, Howard H. Hu, I. Bargatin
Photophoretic or light-driven levitation has been studied extensively in the context of the motion of illuminated micron-sized particles, such as dust grains in the atmosphere under sunlight [1,2], and in relation to Crooks radiometers [3]. When heated by incident light, a micron-sized particle experiences a temperature gradient that in turn results in uneven gas-surface interactions and a net propulsive force [4]. Though thoroughly investigated for micron-sized particles, this phenomenon has rarely been studied to controllably levitate macroscopic objects. We report light-driven levitation of 0.5-um thick mylar samples that have been modified by depositing a 300-nm-thick layer of carbon nanotubes (CNTs) on a single side. The CNT layer serves three key purposes: 1) It acts as a lightweight light absorber, absorbing ~ 90% of the incident light and elevating the temperature of the sample. 2) It increases the structural rigidity of the mylar film, allowing cm-scale discs with submicron thicknesses to hold their shape. 3) It creates a structured porous surface that traps impinging gas molecules, which results in an accommodation coefficient difference between the top and bottom surfaces for gas-surface interactions. Air molecules that rebound from the CNT-coated side have on average higher velocities than those departing from the opposing uncoated mylar surface. We show that the net force thus created can be used to levitate the mylar films. Moreover, we will demonstrate our ability to manipulate a light field in order to control the flight of levitating samples for extended periods of time. References: Jovanovic, O. Photophoresis—Light induced motion of particles suspended in gas. Journal of quantitative spectroscopy & radiative transfer 110, 889–901, (2009) Horvath, Photophoresis – a forgotten force ??, KONA powder and particle journal, 31, 181–199 (2014) Ketsdever, N. Gimelshein, S. Gimelshein, and N. Selden, “Radiometric phenomena: From the 19th to the 21st century”, Vacuum 86, 1644-1662 (2012). Loesche, G. Wurm, T. Jankowski, M. Kuepper, Photophoresis on particles hotter/colder than the ambient gas in the free molecular flow. J. Aerosol Sci, 97, 22–33 (2016)
光致或光驱动悬浮已经在微米级粒子的运动背景下进行了广泛的研究,如大气中的尘埃颗粒在阳光下的运动[1,2],并与克鲁克斯辐射计[3]有关。当被入射光加热时,微米大小的粒子经历温度梯度,从而导致不均匀的气体表面相互作用和净推进力[4]。虽然对微米大小的粒子进行了彻底的研究,但这种现象很少被研究用于控制悬浮宏观物体。我们报告了0.5 um厚的聚酯膜样品的光驱动悬浮,这些样品通过在单面沉积300 nm厚的碳纳米管(CNTs)层来修饰。碳纳米管层有三个主要目的:1)它作为轻质光吸收剂,吸收约90%的入射光并提高样品的温度。2)它增加了聚酯薄膜的结构刚性,使厘米级的圆盘具有亚微米厚度保持其形状。3)它创造了一个结构化的多孔表面,可以捕获撞击的气体分子,这导致气体表面相互作用的上下表面之间的调节系数不同。空气分子从碳纳米管涂层的一面反弹的平均速度比从相反的未涂覆的聚酯膜表面反弹的速度要高。我们表明,由此产生的合力可以用来悬浮聚酯薄膜。此外,我们将展示我们操纵光场的能力,以控制悬浮样品的飞行时间延长。参考文献:Jovanovic, O.光致吸附——悬浮在气体中的粒子的光诱导运动。定量光谱学与辐射传递学报,2009,889-901,(2009)陈晓明,陈晓明,陈晓明,“辐射测量技术的研究进展”,科学通报,2012,(2):1 - 2。卢思哲,杨可夫斯基,M. Kuepper,自由分子流中比环境气体更热/更冷粒子的光致电泳。气溶胶科学,97,22-33 (2016)
{"title":"Controlled Light-Driven Levitation of Macroscopic Plates","authors":"Mohsen Azadi, G. Popov, Zhipeng Lu, Andy G. Eskenazi, A. Bang, M. Campbell, Howard H. Hu, I. Bargatin","doi":"10.3390/micromachines2021-09569","DOIUrl":"https://doi.org/10.3390/micromachines2021-09569","url":null,"abstract":"Photophoretic or light-driven levitation has been studied extensively in the context of the motion of illuminated micron-sized particles, such as dust grains in the atmosphere under sunlight [1,2], and in relation to Crooks radiometers [3]. When heated by incident light, a micron-sized particle experiences a temperature gradient that in turn results in uneven gas-surface interactions and a net propulsive force [4]. Though thoroughly investigated for micron-sized particles, this phenomenon has rarely been studied to controllably levitate macroscopic objects. \u0000We report light-driven levitation of 0.5-um thick mylar samples that have been modified by depositing a 300-nm-thick layer of carbon nanotubes (CNTs) on a single side. The CNT layer serves three key purposes: 1) It acts as a lightweight light absorber, absorbing ~ 90% of the incident light and elevating the temperature of the sample. 2) It increases the structural rigidity of the mylar film, allowing cm-scale discs with submicron thicknesses to hold their shape. 3) It creates a structured porous surface that traps impinging gas molecules, which results in an accommodation coefficient difference between the top and bottom surfaces for gas-surface interactions. Air molecules that rebound from the CNT-coated side have on average higher velocities than those departing from the opposing uncoated mylar surface. We show that the net force thus created can be used to levitate the mylar films. Moreover, we will demonstrate our ability to manipulate a light field in order to control the flight of levitating samples for extended periods of time. \u0000 \u0000References: \u0000 \u0000Jovanovic, O. Photophoresis—Light induced motion of particles suspended in gas. Journal of quantitative spectroscopy & radiative transfer 110, 889–901, (2009) \u0000Horvath, Photophoresis – a forgotten force ??, KONA powder and particle journal, 31, 181–199 (2014) \u0000Ketsdever, N. Gimelshein, S. Gimelshein, and N. Selden, “Radiometric phenomena: From the 19th to the 21st century”, Vacuum 86, 1644-1662 (2012). \u0000Loesche, G. Wurm, T. Jankowski, M. Kuepper, Photophoresis on particles hotter/colder than the ambient gas in the free molecular flow. J. Aerosol Sci, 97, 22–33 (2016)","PeriodicalId":137788,"journal":{"name":"Proceedings of Micromachines 2021 — 1st International Conference on Micromachines and Applications (ICMA2021)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128062935","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
Nanotribological investigation of the poly(3-hydroxybutyrate) films manufactured from the storage polyesters produced by Halomonas elongata DSM 2581 长形盐单胞菌DSM 2581储存聚酯制备聚3-羟基丁酸盐薄膜的纳米摩擦学研究
M. Pustan, C. Bîrleanu, A. Cristea, H. Banciu
Poly(3-hydroxybutyrate) (PHB) is a natural and biodegradable storage polyester, produced by numerous bacteria, which is considered a potential substituent for conventional plastics in the packaging industry. The improvement of the PHB material lifetime often involves the mechanical and tribological characterization which can be accurately performed on thin films. In this study, we aimed at the evaluation of the tribological properties, like adhesion force, friction coefficient and wear resistance, of different polyester films fabricated via the solvent casting method [1]. Three polyester films were designed in this study, each containing 1% w/v constituents as follows: a PHBh film prepared out of the PHB extracted from the extremely halotolerant bacteria Halomonas elongata DSM2581T, a PHBc film fabricated using a commercially available PHB and a PHBVc film generated using the commercial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). The spectroscopy-in-point of AFM was used for adhesion force measurement based on multiple tests performed in a matrix and the AFM lateral operating mode was applied for friction analysis under a controlled normal load. The fabricated PHBh film presented a thickness between 5 µm -7 µm, a lower adhesion force (14 nN) as well as a smaller friction coefficient (0.15) compared to the PHBc and PHBVc. The tribological investigations of PHBh film revealed a biodegradable material with low roughness as well as small adhesion and friction forces. Further optimization can be performed for the improvement of the PHBh film by copolymerization with other polymers, polyesters and reinforcers, thus generating a feasible material with advanced tribo-mechanical features. References [1] Cristea A, Pustan M, Birleanu C, Dudescu C, Floare CG, Tripon AM, Banciu HL. (2021) Mechanical evaluation of solvent casted poly(3-hydroxybutyrate) films derived from the storage polyesters produced by Halomonas elongata DSM 2581T. J Polym Environ, Submitted: ID: JOOE-S-21-00260.
聚(3-羟基丁酸酯)(PHB)是一种天然的可生物降解的储存聚酯,由许多细菌产生,被认为是包装工业中传统塑料的潜在替代品。PHB材料寿命的提高往往涉及到可以在薄膜上精确进行的力学和摩擦学表征。在本研究中,我们旨在评估通过溶剂铸造法制备的不同聚酯薄膜的摩擦学性能,如附着力、摩擦系数和耐磨性[1]。本研究设计了三种聚酯膜,每种膜含有1% w/v的成分:一种是由极耐盐细菌长盐单胞菌DSM2581T提取的PHB制备的PHBh膜,一种是用市售PHB制备的PHBc膜,一种是用市售聚(3-羟基丁酸酯-co-3-羟基戊酸酯)(PHBV)制备的PHBVc膜。基于在一个矩阵中进行的多次测试,采用原子力显微镜的点状光谱进行附着力测量,采用原子力显微镜的横向工作模式进行受控法向载荷下的摩擦分析。与PHBc和PHBVc相比,制备的PHBh膜厚度在5µm -7µm之间,附着力(14 nN)较低,摩擦系数(0.15)较小。对PHBh薄膜的摩擦学研究表明,它是一种具有低粗糙度、小附着力和摩擦力的可生物降解材料。进一步的优化可以通过与其他聚合物、聚酯和增强剂的共聚来改善PHBh薄膜,从而产生具有先进摩擦力学特性的可行材料。[1]刘建军,刘建军,刘建军,刘建军,等。(2021)由长形盐单胞菌(Halomonas elongata DSM 2581T)生产的储存聚酯制成的溶剂铸造聚(3-羟基丁酸酯)薄膜的力学评价。[J]高分子材料,提交:ID: JOOE-S-21-00260。
{"title":"Nanotribological investigation of the poly(3-hydroxybutyrate) films manufactured from the storage polyesters produced by Halomonas elongata DSM 2581","authors":"M. Pustan, C. Bîrleanu, A. Cristea, H. Banciu","doi":"10.3390/MICROMACHINES2021-09564","DOIUrl":"https://doi.org/10.3390/MICROMACHINES2021-09564","url":null,"abstract":"Poly(3-hydroxybutyrate) (PHB) is a natural and biodegradable storage polyester, produced by numerous bacteria, which is considered a potential substituent for conventional plastics in the packaging industry. The improvement of the PHB material lifetime often involves the mechanical and tribological characterization which can be accurately performed on thin films. In this study, we aimed at the evaluation of the tribological properties, like adhesion force, friction coefficient and wear resistance, of different polyester films fabricated via the solvent casting method [1]. Three polyester films were designed in this study, each containing 1% w/v constituents as follows: a PHBh film prepared out of the PHB extracted from the extremely halotolerant bacteria Halomonas elongata DSM2581T, a PHBc film fabricated using a commercially available PHB and a PHBVc film generated using the commercial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). The spectroscopy-in-point of AFM was used for adhesion force measurement based on multiple tests performed in a matrix and the AFM lateral operating mode was applied for friction analysis under a controlled normal load. The fabricated PHBh film presented a thickness between 5 µm -7 µm, a lower adhesion force (14 nN) as well as a smaller friction coefficient (0.15) compared to the PHBc and PHBVc. The tribological investigations of PHBh film revealed a biodegradable material with low roughness as well as small adhesion and friction forces. Further optimization can be performed for the improvement of the PHBh film by copolymerization with other polymers, polyesters and reinforcers, thus generating a feasible material with advanced tribo-mechanical features. \u0000References \u0000[1] Cristea A, Pustan M, Birleanu C, Dudescu C, Floare CG, Tripon AM, Banciu HL. (2021) Mechanical evaluation of solvent casted poly(3-hydroxybutyrate) films derived from the storage polyesters produced by Halomonas elongata DSM 2581T. J Polym Environ, Submitted: ID: JOOE-S-21-00260.","PeriodicalId":137788,"journal":{"name":"Proceedings of Micromachines 2021 — 1st International Conference on Micromachines and Applications (ICMA2021)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127725795","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
期刊
Proceedings of Micromachines 2021 — 1st International Conference on Micromachines and Applications (ICMA2021)
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1