Ultrahydrophobic PMMA micro- and nano-textured surfaces fabricated by optical lithography and plasma etching for X-ray diffraction studies

Angelo Accardo; Francesco Gentile; Federico Mecarini; Francesco De Angelis; Manfred Burghammer; Enzo Di Fabrizio; Christian Riekel

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Ultrahydrophobic PMMA micro- and nano-textured surfaces fabricated by optical lithography and plasma etching for X-ray diffraction studies

机译：通过光学光刻和等离子蚀刻制造的用于X射线衍射研究的超疏水PMMA微和纳米纹理表面

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摘要

Polymeric (PMMA) ultrahydrophobic surfaces with contact angles up to about 170° have been fabricated and used in the context of synchrotron radiation experiments on biological droplets. The different micro-fabrication processes included either an optical lithography phase followed by a plasma texturing one or a single step deep reactive ion etch attack. The drying of several biological solution droplets has been monitored. Room temperature evaporation experiments (lysozyme, lactalbumin, cytochrome C, doxorubicin and synthesized peptides) finally result in the formation of easily detachable hollow residuals because of the low interaction between the ultrahydrophobic substrate and the aqueous droplet while pilot experiments (bovine insulin) in a sitting-drop environment bring to the formation of well defined crystals. Recent results about in situ X-ray diffraction experiments by SAXS & WAXS (Small and Wide Angle X-ray Scattering) u.-beam techniques confirm that the presence of such surfaces influences the formation of crystal or fibril structures. These substrates represent indeed a suitable support to study biological and inorganic droplets in a near contact-free environment exploiting the homogeneous evaporation rate induced by the ultrahydrophobicity of the system.

机译：已经制造了具有高达约170°接触角的聚合物（PMMA）超疏水表面，并将其用于生物液滴的同步辐射实验中。不同的微加工工艺包括光刻阶段，然后是等离子体织构化一个或一步的深反应离子刻蚀。已经监测了几种生物溶液液滴的干燥。室温蒸发实验（溶菌酶，乳清蛋白，细胞色素C，阿霉素和合成的肽）最终导致易于分离的空心残留物的形成，因为坐在试验实验（牛胰岛素）时超疏水性底物与水滴之间的相互作用很低。滴环境带来了定义明确的晶体的形成。 SAXS和WAXS（小和广角X射线散射）u射线技术进行的原位X射线衍射实验的最新结果证实，此类表面的存在会影响晶体或原纤维结构的形成。这些底物确实代表了在接近无接触的环境中利用系统超疏水性诱导的均匀蒸发速率研究生物和无机液滴的合适载体。

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来源
《Microelectronic Engineering》 |2011年第8期|p.1660-1663|共4页
作者
Angelo Accardo; Francesco Gentile; Federico Mecarini; Francesco De Angelis; Manfred Burghammer; Enzo Di Fabrizio; Christian Riekel;
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作者单位

Center of Bio-Nanotechnology and Engineering for Medicine, University Magna Graecia, Viale Europa, Catanzaro 88100, Italy European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France Italian Institute of Technology, Via Morego, Genova 13163, Italy Center of Bio-Nanotechnology and Engineering for Medicine. University Magna Grajcia, Viale Europa, Catanzaro 88100. Italy;

Center of Bio-Nanotechnology and Engineering for Medicine, University Magna Graecia, Viale Europa, Catanzaro 88100, Italy Italian Institute of Technology, Via Morego, Genova 13163, Italy;

Center of Bio-Nanotechnology and Engineering for Medicine, University Magna Graecia, Viale Europa, Catanzaro 88100, Italy Italian Institute of Technology, Via Morego, Genova 13163, Italy;

Center of Bio-Nanotechnology and Engineering for Medicine, University Magna Graecia, Viale Europa, Catanzaro 88100, Italy Italian Institute of Technology, Via Morego, Genova 13163, Italy;

European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France;

Center of Bio-Nanotechnology and Engineering for Medicine, University Magna Graecia, Viale Europa, Catanzaro 88100, Italy Italian Institute of Technology, Via Morego, Genova 13163, Italy;

European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
superhydrophobicity; pmma; x-ray diffraction; droplet evaporation; protein; peptide; residual; crystallization;

机译：超疏水性;pmma;X射线衍射;液滴蒸发;蛋白质;肽;残留;结晶;

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Ultrahydrophobic PMMA micro- and nano-textured surfaces fabricated by optical lithography and plasma etching for X-ray diffraction studies

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