Deterministic Reshaping of Breath Figure Arrays by Directional Photomanipulation

Wang, Wei; Yao, Yuan; Luo, Tianchan; Chen, Lingzhi; Lin, Jiaping; Li, Lei; Lin, Shaoliang

doi:10.1021/acsami.6b14024

Cited by 39 publications

(25 citation statements)

References 61 publications

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“…Finally, the solvent and water drops evaporated successively, fabricating regular porous honeycomb film 5 – 7 . By using BFs approach, a large number of regular porous honeycomb films with various structures and morphologies have been fabricated 8 – 11 .…”

Section: Introductionmentioning

confidence: 99%

Poly (ionic liquid)-Based Breath Figure Films: A New Kind of Honeycomb Porous Films with Great Extendable Capability

Zhang

Gao

et al. 2017

Sci Rep

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In this work, we reported a new method for the convenient fabrication of various functional porous films, which cannot be directly generated using breath figures (BFs). A series of polystyrene-b-poly (ionic liquid) (PS-b-PIL) block copolymers were employed for BFs process for the first time. It was found that PS-b-PIL could form well-defined BFs porous structure. Remarkably, the described PSb-PIL copolymers are prone to form hierarchical structure, and the formed pore structure is strongly dependent on the used experimental parameters. Importantly, we found that the anion exchange could provide as an effective means, by which the porous films could be further and facilely converted into other functional films. As a demonstration, in our case, porous films with different surface (hydrophilic and hydrophobic) property, porous polydopamine films decorated with Au nanoparticles or glutathione and porous SiO 2 films were prepared by using different counteranions as well as further conversion. Due to the unlimited combination of cation and anion in ionic liquid moiety, all the results indicate that the BFs films generated by using PS-PIL could serve as a platform to access various functional porous films by a simple counteranion exchange, showing a great extendable capability. François et al. 1 which is a rapid, low-cost and versatile approach for efficiently producing regular porous honeycomb films. In the past two decades, honeycomb structured films have drawn considerable attention owing to their huge potential applications in a wide variety of fields, including as template 2 , separation 3 and sensor 4 . Up to now, a widely recognized mechanism of BFs is described below. Firstly, the solution cooled and water vapor condensed, producing small and disordered water drops on the surface of the solution. Secondly, the water drops grew and self-assembled, forming a closely packed and regular array on the surface of the solution. Finally, the solvent and water drops evaporated successively, fabricating regular porous honeycomb film [5][6][7] . By using BFs approach, a large number of regular porous honeycomb films with various structures and morphologies have been fabricated [8][9][10][11] . Breath figures (BFs) which is first reported in 1994 byThe materials suitable for the BFs process, however, are limited to soluble polymers and a small group of other materials 11 . A lot of functional materials cannot be directly utilized in the BF process. Thus, developing new strategy to access extended porous materials by exploiting the advantages of the BFs process is highly desirable. Few studies have been reported to address the relevant problems. For example, Li and co-workers use ferrocene and zinc acetylacetonate as precursors, Fe 2 O 3 and ZnO inorganic porous honeycomb structures can be fabricated by pyrolysing corresponding PS-b-PAA/precursor composites breath figures arrays. These inorganic honeycomb patterns are used as either nuclear site or catalyst, which further direct the formation of CNTs patterns by chemical va...

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Section: Introductionmentioning

confidence: 99%

Poly (ionic liquid)-Based Breath Figure Films: A New Kind of Honeycomb Porous Films with Great Extendable Capability

Zhang

Gao

et al. 2017

Sci Rep

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“…If azomaterials properties are coupled with other fabrication techniques, micro/nano structures of different shape and size can be realized [11,134,135] e.g. parallel groves [32,107,112,136], array of microporous [137][138][139][140][141] and hemispherical caps [142,143], whose geometry can be successively modified. Indeed, this technique allows to produce very sophisticated micro/nanoarchitecture that would be difficult to attain with other methods [12,107,144,145].…”

Section: Directional Photofluidization Lithography (Dpl)mentioning

confidence: 99%

Photonic applications of azobenzene molecules embedded in amorphous polymer

2020

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The incorporation of azobenzene chromophores into polymer systems gives rise to a number of unique effects under UV and visible light irradiation. The light-driven isomerization of the azobenzene element acts as a light-to-mechanical energy converter, translating the nanoscopic structural movement of the isomerization azobenzene into macroscopic topographic film modulation in the form of surface relief. This review focuses on the study of reversible changes in shape in various systems incorporating azobenzene, including large-scale superficial photo-patterned glassy materials, light-driven reshaping of tridimensional superficial azo-textures and contractions of stimuli-responsive liquid crystalline networks (LCNs). Further, promising applications of azo systems are investigated as smart biointerfaces able to mimic time-varying biological systems.

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“…makes them suitable candidates to be used as water purifying biomembranes. 124,179,181 Liu et al 124 reported a super-hydrophilic Cu(II) ion adsorbing CNF membrane for the remediation of industrial effluents. In their work, CNF were synthesised via TEMPO mediated oxidation of cellulose sludge obtained from agricultural waste and the developed nanobers were in the size range of 18-40 nm with high specic surface area which was in the range of 134-215 g m À2 .…”

Section: Water Puricationmentioning

confidence: 99%

Extraction and modification of cellulose nanofibers derived from biomass for environmental application

et al. 2017

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Cellulose is a natural biopolymer that is abundantly available in plant cell walls and is secreted in its pure forms by many bacteria. Due to their unique features cellulose materials are considered as efficient replacements for conventional polymers. Cellulose nanofibers (CNF) have attracted wide interest due to their nano size, ease of preparation, low cost, tuneable surface properties and enhanced mechanical properties. However, the efficiency of CNF depends on the extraction method employed from its source and their features vary from source to source. Hence, there is a need to understand the specificity of CNF extraction from its source in order to obtain highly efficient CNF with maximum potential. CNF has been extracted from plant sources using physical, chemical and enzymatic methods. Although plant derived CNF possess excellent features, the involvement of chemicals and complexity in extraction process limits their usage. Bacterial CNF overcome this limitation through its extracellular secretion which makes extraction easy. CNF is also extracted from various marine filamentous algae. The percentage of CNF obtained from algal sources is less compared to plants and bacterial sources. CNF finds wide variety of applications such as drug carriers, tissue regenerating scaffolds, water purifying Ms. Mridula Prakash Menon is presently working as a PhD Research Scholar in the Nanobiotechnology laboratory at PSG Institute of Advanced Studies, Coimbatore, Tamil Nadu, India. She has completed her Masters in Biotechnology and M.Phil. in Nanoscience and Technology at PSG Institute of Advanced Studies. Her research interests include synthesis of nanomaterials for biomedical and environmental applications, microbial biotechnology, water puri-cation, and bioremediation and drug delivery. 151 Commercially obtained Electrospinning Size; 4.6 AE 1.8 mm and 8.1 AE 2.2 mm, high uid permeability (8.9 Â 10 À12 m 2 ) 152 42754 | RSC Adv., 2017, 7, 42750-42773 This journal isFig. 1 SEM images of various types of CNF synthesized from cotton (a) natural electrospun CNF 56 (b) aligned CNF (scale bar 1 mm) 54 (c): CdS functionalized CNF 33 (d): CeO 2 functionalized CNF 56 (e): CNF prepared by acid hydrolysis 52 (adopted with permission).This journal is

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Deterministic Reshaping of Breath Figure Arrays by Directional Photomanipulation

Cited by 39 publications

References 61 publications

Poly (ionic liquid)-Based Breath Figure Films: A New Kind of Honeycomb Porous Films with Great Extendable Capability

Poly (ionic liquid)-Based Breath Figure Films: A New Kind of Honeycomb Porous Films with Great Extendable Capability

Photonic applications of azobenzene molecules embedded in amorphous polymer

Extraction and modification of cellulose nanofibers derived from biomass for environmental application

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