Monolayer Colloidal Crystals by Modified Air-Water Interface Self-Assembly Approach

Ye, Xin; Huang, Jin; Zeng, Yong; Sun, Laixi; Geng, Feng; Liu, Hongjie; Wang, Fengrui; Jiang, Xiaodong; Wu, Weidong; Zheng, Wanguo

doi:10.3390/nano7100291

Cited by 33 publications

(17 citation statements)

References 33 publications

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“…The quality of the colloidal crystal lattice is affected by various factors, such as the polydispersity of spheres, dispersion properties, spin-coating process parameters (spinning protocols), and wetting properties of the substrate [33]. It has to be pointed out that crystalline defects are inevitable-dislocations, vacancies, cracks, and other defects ( Figure 1a) always emerge in self-assembled masks [29,34].…”

Section: Hexagonal Close-packed Arraysmentioning

confidence: 99%

Nanosphere Lithography for Structuring Polycrystalline Diamond Films

2020

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This paper deals with the structuring of polycrystalline diamond thin films using the technique of nanosphere lithography. The presented multistep approaches relied on a spin-coated self-assembled monolayer of polystyrene spheres, which served as a lithographic mask for the further custom nanofabrication steps. Various arrays of diamond nanostructures-close-packed and non-close-packed monolayers over substrates with various levels of surface roughness, noble metal films over nanosphere arrays, ordered arrays of holes, and unordered pores-were created using reactive ion etching, chemical vapour deposition, metallization, and/or lift-off processes. The size and shape of the lithographic mask was altered using oxygen plasma etching. The periodicity of the final structure was defined by the initial diameter of the spheres. The surface morphology of the samples was characterized using scanning electron microscopy. The advantages and limitations of the fabrication technique are discussed. Finally, the potential applications (e.g., photonics, plasmonics) of the obtained nanostructures are reviewed.

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Section: Hexagonal Close-packed Arraysmentioning

confidence: 99%

Nanosphere Lithography for Structuring Polycrystalline Diamond Films

2020

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“…Colloidal crystals are typically constructed via a self-assembly route, but their small sample size and excess defects render them impractical for engineering applications [34,35]. In our laboratory, we have adopted the electrophoresis to construct colloidal crystals in both planar and cylindrical forms, and relevant electrophoresis parameters have been fully optimized [36][37][38][39].…”

Section: Fabrication Of Colloidal Crystals and Their Inverse Opalsmentioning

confidence: 99%

Green Synthesis of Ni@PEDOT and Ni@PEDOT/Au (Core@Shell) Inverse Opals for Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid

et al. 2020

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We demonstrate a water-based synthetic route to fabricate composite inverse opals for simultaneous detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA). Our process involves the conformal deposition of poly(3,4-ethylenedioxythiophene) (PEDOT) and PEDOT/Au on the skeletons of Ni inverse opals via cyclic voltammetric scans (CV) to initiate the electropolymerization of 3,4-ethylenedioxythiophene (EDOT) monomers. The resulting samples, Ni@PEDOT, and Ni@PEDOT/Au inverse opals, exhibit a three-dimensional ordered macroporous platform with a large surface area and interconnected pore channels, desirable attributes for facile mass transfer and strong reaction for analytes. Structural characterization and material/chemical analysis including scanning electron microscope, X-ray photoelectron spectroscopy, and Raman spectroscopy are carried out. The sensing performances of Ni@PEDOT and Ni@PEDOT/Au inverse opals are explored by conducting CV scans with various concentrations of AA, DA, and UA. By leveraging the structural advantages of inverse opals and the selection of PEDOT/Au composite, the Ni@PEDOT/Au inverse opals reveal improved sensing performances over those of conventional PEDOT-based nanostructured sensors.

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“…The periodic patterns from mono-dispersed spheres have been applied on the fields of porous materials, photonic crystals, and so forth [3][4][5]. Methods have been developed for the preparation of an ordered pattern consisting of colloid particles, such as photolithography, self-assembly, inversed opals, and so forth [6][7][8]. In addition, most microsphere patterns are prepared on planar substrates, which are involved in elaborate and complicated processes, expensive instruments, as well as long time and professional operators, such as in photolithography techniques, and require limited materials, for example, self-assembly and inversed opals approaches.…”

Section: Introductionmentioning

confidence: 99%

Mono-Dispersed Microspheres Locally Assembled on Porous Substrates Formed through a Microemulsion Approach

et al. 2020

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A cost-effective, simple, and time-saving method to fabricate mono-dispersed periodic microsphere structures on substrates with patterned sites is very meaningful due to their significance on various biological studies. Herein, a simple and facile method to fabricate mono-dispersed microsphere arrays on porous substrates was developed. The mixture of polystyrene and an organic stabilizer solution which contains aqueous solution, fabricated through shaking, was applied to prepare microemulsion solution. An ordered porous structure was produced by spreading and evaporating the solvent of microemulsion on a glass slide, accompanied by the enrichment of didodecylamine in the cavities. The porous cavities were further modified with polyacrylic acid and poly(diallyldimethylammonium chloride) which could immobilize the microspheres. The charged microspheres were incorporated into the cavities by an electrostatic interaction with the oppositely charged polyelectrolytes. The positive polyelectrolytes with abundant charges as well as a suitable content and dimension of microspheres, ensured the formation of mono-dispersed and ordered arrays. Considering that other charged particles were universally suitable for the present strategy, the reported approach opened an efficient way for the preparation of microsphere-based materials.

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Monolayer Colloidal Crystals by Modified Air-Water Interface Self-Assembly Approach

Cited by 33 publications

References 33 publications

Nanosphere Lithography for Structuring Polycrystalline Diamond Films

Nanosphere Lithography for Structuring Polycrystalline Diamond Films

Green Synthesis of Ni@PEDOT and Ni@PEDOT/Au (Core@Shell) Inverse Opals for Simultaneous Detection of Ascorbic Acid, Dopamine, and Uric Acid

Mono-Dispersed Microspheres Locally Assembled on Porous Substrates Formed through a Microemulsion Approach

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