Growth of sculptured polymer submicronwire assemblies by vapor deposition

Pursel, Sean M.; Horn, Mark W.; Demirel, Melik C.; Lakhtakia, Akhlesh

doi:10.1016/j.polymer.2005.07.092

Cited by 84 publications

(38 citation statements)

References 25 publications

(21 reference statements)

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“…OAP was fi rst introduced by Pursel et al in 2005 who showed the formation of helical structures. [ 142 ] For OAP, a nozzle is typically directed at a shallow angle ( ≈ 10 ° ) with respect to the substrate, whereas the nozzle is perpendicular to the substrate in traditional polymer CVD. Notable applications of OAP include surfaces with anisotropic wetting and adhesion, [ 13 , 143 ] and templates for metal deposition that enable biosensing by Surface Enhanced Raman Spectroscopy (SERS).…”

Section: Oblique Angle Polymerizationmentioning

confidence: 99%

“…[ 144 ] In the case of parylene deposition by OAP, a dimer is evaporated at 150-175 ° C and then pyrolized into a monomer precursor resulting in a chemical structure such as poly-p-xylene (PPX) that leaves the nozzle at pressure of ≈ 10 mTorr. [ 142 ] Because the fl ux is directed onto the substrate at a shallow angle, a network of molecular strands nucleates on the substrate without forming a continuous fi lm due to shadowing effects. ( Figure 23 ) The strands then start to aggregate into columns of 200-400 nm diameter, which are inclined with respect to the substrate.…”

Section: Oblique Angle Polymerizationmentioning

confidence: 99%

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Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Tawfick¹,

Volder²,

Copic³

et al. 2012

Advanced Materials

212

179

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Widespread approaches to fabricate surfaces with robust micro- and nanostructured topographies have been stimulated by opportunities to enhance interface performance by combining physical and chemical effects. In particular, arrays of asymmetric surface features, such as arrays of grooves, inclined pillars, and helical protrusions, have been shown to impart unique anisotropy in properties including wetting, adhesion, thermal and/or electrical conductivity, optical activity, and capability to direct cell growth. These properties are of wide interest for applications including energy conversion, microelectronics, chemical and biological sensing, and bioengineering. However, fabrication of asymmetric surface features often pushes the limits of traditional etching and deposition techniques, making it challenging to produce the desired surfaces in a scalable and cost-effective manner. We review and classify approaches to fabricate arrays of asymmetric 2D and 3D surface features, in polymers, metals, and ceramics. Analytical and empirical relationships among geometries, materials, and surface properties are discussed, especially in the context of the applications mentioned above. Further, opportunities for new fabrication methods that combine lithography with principles of self-assembly are identified, aiming to establish design principles for fabrication of arbitrary 3D surface textures over large areas.

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Section: Oblique Angle Polymerizationmentioning

confidence: 99%

Section: Oblique Angle Polymerizationmentioning

confidence: 99%

Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Tawfick¹,

Volder²,

Copic³

et al. 2012

Advanced Materials

212

179

View full text Add to dashboard Cite

show abstract

“…In the recent years, STFs become more valuable as a platform of optical devices to the optics community [1][2][3][4]. Glancing angle deposition (GLAD), an advanced technique for fabricating designed microstructures at nanometer scale, is used to fabricate the STFs.…”

Section: Introductionmentioning

confidence: 99%

Optical and Structural Properties of Bilayer Circular Filter Prepared by Glancing Angle Deposition

Park

Sobahan

Kim

et al. 2009

Journal of the Optical Society of Korea

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In this paper, we report the optical and structural properties of a bilayer circular filter fabricated by a glancing angle deposition technique. The bilayer circular filter is realized by a two-layer TiO2 helical film with layers of opposite structural handedness. It is found that the bilayer circular filter reflects both right and left circularly polarized light with wavelength lying in the Bragg regime. The microstructure of the bilayer circular filter is also investigated using a scanning electron microscope.

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“…In this technique, oblique angle deposition and substrate rotation are employed to control the columnar microstructures of the films. By exploiting various substrate tilt and rotation, the porosity, microstructure and morphology of the film can be tuned [1][2]. Hence, refractive index which may be beneficial in developing interference filters can be controlled.…”

Section: Introductionmentioning

confidence: 99%

Glancing angle deposition of SiO2 thin film microstructures: Investigations of optical and morphological properties

Tokas¹,

Jena²,

Sarkar³

et al. 2014

AIP Conference Proceedings

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Growth of sculptured polymer submicronwire assemblies by vapor deposition

Cited by 84 publications

References 25 publications

Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Engineering of Micro‐ and Nanostructured Surfaces with Anisotropic Geometries and Properties

Optical and Structural Properties of Bilayer Circular Filter Prepared by Glancing Angle Deposition

Glancing angle deposition of SiO2 thin film microstructures: Investigations of optical and morphological properties

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