Controllable fabrication of 2D colloidal-crystal films with polystyrene nanospheres of various diameters by spin-coating

Chen, Jian; Dong, Pinliang; Di, Di; Wang, Chaoguang; Wang, Haoxu; Wang, Junfeng; Wu, Xuezhong

doi:10.1016/j.apsusc.2012.11.165

Cited by 83 publications

(67 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spin-coating parameters were optimized to generate a single layer colloid crystal domain with the method we previously introduced. 35 The spin-coated wafer was shown in Figure 4(a). Six-fold symmetry arms appeared on the wafer when illuminated with white light.…”

Section: Spin-coatingmentioning

confidence: 99%

Diversification of Nanostructure Morphology by Modifying Angle-Resolved Heterogeneous Shadow Mask

Wang

Wu²,

Dong³

et al. 2013

j. nanosci. nanotech.

Self Cite

View full text Add to dashboard Cite

This article presents a facile and generally applicable methodology for the morphology diversification of two-dimensional (2D) nanostructure arrays by modifying angle-resolved heterogeneous shadow mask (AR-HSM). Colloid spheres are used to prepare scalable well-organized monolayer film by self-assembly method and then etched in oxygen plasma to reduce size. Subsequently, the heterogeneous layer is generated by tilted metal deposition technique, then utilized as shadow mask in the substrate etching process, and finally removed by wet etching technique. As a result, the controllable fabrication of a series of complex morphologies, ranging from the crescent structure to the hoof-like structure and the stripes with apexes, is realized. The morphology of the nanostructure array is depend on the profile of the heterogeneous shadow mask (HSM) which is correlated to the incidence angle of the metal vapor. Therefore, a theoretical model is built for the prediction and design of the nanostructure morphology. This AR-HSM aided approach provides a novel and accessible route for the diversification of nanostructure morphology; and can be readily extended to other functional substrates which may be applied in photovoltaic devices or bio-chemical sensors.

show abstract

Section: Spin-coatingmentioning

confidence: 99%

Diversification of Nanostructure Morphology by Modifying Angle-Resolved Heterogeneous Shadow Mask

Wang

Wu²,

Dong³

et al. 2013

j. nanosci. nanotech.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The first step relies on the formation and quality of the monolayer of nanospheres, see figure 1. There are several methods for the formation of self-organized colloidal-crystal films, such as gravity sedimentation 6 , electrophoretic deposition 7 , solvent evaporation 8 , Langmuir-Blodgett (LB) 9 , air-water interfacial floating method 10 and spin coating 11,12 . The second step involves the control of the diameter of the nanospheres packed in arrays by dry etching 13 .…”

Section: Introductionmentioning

confidence: 99%

Self-assembly based nanometer-scale patterning for nanowire growth

et al. 2015

View full text Add to dashboard Cite

Periodic nanostructure arrays have been ubiquitously exploited lately due to their properties and prospective applications in production of templates for self-induced and gold (Au)-catalysed nanowires (NWs), because this approach is relatively cheap, time-efficient and do not require electron beam lithography. The technique consists creating nanoholes in SiO 2 to expose the silicon Si (111) beneath where self-induced NWs can nucleate, while nanodots deposited onto the Si (111) surface serve as catalyst seeds. For Au-catalysed NWs, a monolayer of self-assembled polystyrene nanospheres (PNS 300nm) was created on a 2 inch Si wafer by spin coating and later etched for a short time before a very thin Au-catalyst layer was deposited. In turn, for self-induced, PNS monolayer was created onto a SiO 2 -Si substrate. A longer etch was required to reduce PNS diameter significantly to leave relatively larger spacing where chromium is blanket deposited. PNS were lifted off by sonicating the samples in toluene produce the periodic arrays of nanodots and nanoholes, respectively. The underlying SiO 2 was etched further through the nanoholes to uncover the Si below. 200 nm holes and 30-70 nm dots were demonstrated through the bespoke methods. The patterned substrates served as master templates, subsequently copied using polydimethylsiloxane (PDMS) to produce a flexible stamp for nanoimprint lithography. A bilayer resist lift off process was developed to print the replicated nanodots or nanoholes on large-area substrates onto which III-V NWs can be grown.

show abstract

“…The nanosphere suspension was then spin coated on the samples, applying several parameters. 26,27 We employed a two-step spin-coating process with a fast spin to spread the nanospheres, followed by a slow spin for drying. Our optimized parameters were a spin for 10 s at 2200 rpm with 600 rpm∕s, followed by 30 s at 1000 rpm with 200 rpm∕s.…”

Section: Fabricationmentioning

confidence: 99%

Fabrication and improvement of nanopillar InGaN / GaN light-emitting diodes using nanosphere lithography

Fadil

Zhan

et al. 2015

J. Nanophoton

View full text Add to dashboard Cite

Abstract. Surface-patterning technologies have enabled the improvement of currently existing light-emitting diodes (LEDs) and can be used to overcome the issue of low quantum efficiency of green GaN-based LEDs. We have applied nanosphere lithography to fabricate nanopillars on InGaN∕GaN quantum-well LEDs. By etching through the active region, it is possible to improve both the light extraction efficiency and, in addition, the internal quantum efficiency through the effects of lattice strain relaxation. Nanopillars of different sizes are fabricated and analyzed using Raman spectroscopy. We have shown that nanopillar LEDs can be significantly improved by applying a combination of ion-damage curing techniques, including thermal and acidic treatment, and have analyzed their effects using x-ray photoelectron spectroscopy.

show abstract

Controllable fabrication of 2D colloidal-crystal films with polystyrene nanospheres of various diameters by spin-coating

Cited by 83 publications

References 38 publications

Diversification of Nanostructure Morphology by Modifying Angle-Resolved Heterogeneous Shadow Mask

Diversification of Nanostructure Morphology by Modifying Angle-Resolved Heterogeneous Shadow Mask

Self-assembly based nanometer-scale patterning for nanowire growth

Fabrication and improvement of nanopillar InGaN / GaN light-emitting diodes using nanosphere lithography

Contact Info

Product

Resources

About