Hydrophobic Metallic Nanorods coated with Teflon Nanopatches by Glancing Angle Deposition

2009 ◽  
Vol 1188 ◽  
Author(s):  
Wisam J Khudhayer ◽  
Rajesh Sharma ◽  
Tansel Karabacak
Keyword(s):  
Contact Angle ◽  
Normal Incidence ◽  
Glancing Angle Deposition ◽  
Nanorod Arrays ◽  
Hydrophobic Property ◽  
Glancing Angle ◽  
Shadowing Effect ◽  
Glad Technique ◽  
Metallic Nanorods ◽  
Angle Deposition

AbstractIntroducing a hydrophobic property to vertically aligned hydrophilic metallic nanorods was investigated experimentally and theoretically. First, platinum nanorod arrays were deposited on flat silicon substrates using a sputter Glancing Angle Deposition Technique (GLAD). Then a thin layer of Teflon (nanopatches) was partially deposited on the tips of platinum nanorod at a glancing angle of  = 85° as well as at normal incidence ( = 0°) for different deposition times. We show that GLAD technique is capable of depositing ultrathin isolated Teflon nanopatches on selective regions of nanorod arrays due to the shadowing effect during GLAD. Contact angle measurements on Pt/Teflon nano-composite have shown contact angle values as high as 138°, indicating a significant increase in the hydrophobicity of originally hydrophilic Pt nanostructures. Finally, a 2D simplified wetting model utilizing Cassie and Baxter theory of heterogeneous surfaces has been developed to explain the wetting behavior of Pt/Teflon nanocomposite.

Hydrophobicity of Teflon Coated Well-Ordered Silver Nanorod Arrays

2012 ◽  
Vol 1389 ◽  
Author(s):  
Arif S. Alagoz ◽  
Wisam J. Khudhayer ◽  
Tansel Karabacak
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Hierarchical Structures ◽  
Silicon Substrates ◽  
Nanorod Arrays ◽  
Water Contact ◽  
Glad Technique ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Angle Deposition

ABSTRACTFrom wings of flies to plant leafs, hydrophobic surfaces are well-common in nature. Many of these surfaces have micro and nano hierarchical structures coated with low surface energy layer. In this work, we mimicked similar structure by fabricating Teflon coated periodic and well-ordered silver nanorod arrays and investigated the effect of nanorod separation on water contact angle (WCA). The silver nanorod arrays were deposited on patterned and flat silicon substrates using glancing angle deposition (GLAD) technique. Then a thin layer of Teflon was deposited on the silver nanorods by small angle deposition (SAD) technique. A systematic increase in water contact angle was observed with increasing nanorod separation which is attributed to the decreased area fraction of solid-liquid interface.

Glancing angle deposition of Ge nanorod arrays on Si patterned substrates

2011 ◽  
Vol 29 (4) ◽  
pp. 041503 ◽  
Author(s):  
C. Khare ◽  
R. Fechner ◽  
J. Bauer ◽  
M. Weise ◽  
B. Rauschenbach
Keyword(s):  
Glancing Angle Deposition ◽  
Nanorod Arrays ◽  
Patterned Substrates ◽  
Glancing Angle ◽  
Angle Deposition

Structural Evolution of Nanostructured YBa2Cu3Ox Thin Films Formed by Pulsed Laser Glancing Angle Deposition

2007 ◽  
Vol 121-123 ◽  
pp. 947-950
Author(s):  
H.H. Wang ◽  
Y.P. Zhao
Keyword(s):  
Thin Films ◽  
Laser Fluence ◽  
Pulsed Laser ◽  
Structural Evolution ◽  
Glancing Angle Deposition ◽  
Ambient Oxygen ◽  
Glancing Angle ◽  
Shadowing Effect ◽  
Ambient Gas ◽  
Angle Deposition

Nano-structured thin films of amorphous YBa2Cu3Ox were prepared by pulsed laser glancing angle deposition. Ambient oxygen pressure and laser fluence have a strong effect on the microstructure of the films. The films exhibit a structural evolution from isolated nanorods, through network of vertical nanocolumns, to nanoparticles fractal with increasing ambient oxygen pressures. Shadowing effect, surface diffusion and flux scattering by ambient gas play main roles in determining the structural evolution.

Two-Component Nanorod Arrays by Glancing-Angle Deposition

Small ◽  
2008 ◽  
Vol 4 (9) ◽  
pp. 1351-1354 ◽  
Author(s):  
Chunming Zhou ◽  
Daniel Gall
Keyword(s):  
Glancing Angle Deposition ◽  
Nanorod Arrays ◽  
Glancing Angle ◽  
Two Component ◽  
Angle Deposition

High Optical Absorption of Indium Sulfide Nanorod Arrays Formed by Glancing Angle Deposition

2009 ◽  
Vol 1165 ◽  
Author(s):  
Mehmet Cansizoglu ◽  
Robert Engelken ◽  
Hye-Won Seo ◽  
Tansel Karabacak
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Optical Sensors ◽  
High Efficiency ◽  
Glancing Angle Deposition ◽  
Indium Sulfide ◽  
Nanorod Arrays ◽  
Absorption Properties ◽  
Glancing Angle ◽  
Angle Deposition

AbstractIndium (III) sulfide has recently attracted much attention due to its potential in optical sensors as a photoconducting material and in photovoltaic applications as a wide direct bandgap material. On the other hand, optical absorption properties are key parameters in developing highly photosensitive photodetectors and high efficiency solar cells. We show that indium sulfide nanorod arrays produced by glancing angle deposition techniques have superior absorption and low reflectance properties compared to conventional flat thin film counterparts. We observed an optical absorption value of approximately 96% for nanorods, in contrast to 80% for conventional amorphous-to-polycrystalline thin films of indium sulfide. A photoconductivity response was also observed in the nanorod samples, whereas no measurable photoresponse was detected in conventional thin films. We give a preliminary description of the enhanced light absorption properties of the nanorods by using Shirley-George Model that predicts enhanced diffuse scattering and reduced reflection of light due the rough morphology.

scholarly journals Physical Self-Assembly And Nano-Patterning

2004 ◽  
Vol 849 ◽  
Author(s):  
T.-M. Lu ◽  
D.-X. Ye ◽  
T. Karabacak ◽  
G.-C. Wang
Keyword(s):  
Self Assembly ◽  
Glancing Angle Deposition ◽  
Oblique Angle Deposition ◽  
Oblique Angle ◽  
Two Phase ◽  
Assembly Mechanism ◽  
Rotation Scheme ◽  
Glancing Angle ◽  
Shadowing Effect ◽  
Angle Deposition

AbstractIt is known that oblique angle deposition (or glancing angle deposition) can create 3D architectures that are otherwise difficult to produce using the conventional lithographic techniques. The technique relies on a self-assembly mechanism originated from a physical shadowing effect during deposition. In this paper we show examples of 3D nanostructures obtained by this oblique angle deposition on a templated substrate with regularly spaced pillar seeds. We show that common to this technique is the phenomenon of side-way growth on the seeds. The side-way growth leads to a fan-like structure at the initial stages of growth if the incident oblique angle is fixed during growth. Simulations based on a steering effect due to the attractive force between the incoming atom and the existing atoms on the surface produce a fanlike structure similar to that observed experimentally. We show that a two-phase substrate rotation scheme during deposition can dramatically reduce this fan-out effect and can lead to uniform and isolated columns.

Morphology dependent surface enhanced fluorescence study on silver nanorod arrays fabricated by glancing angle deposition

RSC Advances ◽  
2015 ◽  
Vol 5 (40) ◽  
pp. 31341-31346 ◽  
Author(s):  
Dhruv Pratap Singh ◽  
Samir Kumar ◽  
J. P. Singh
Keyword(s):  
Rhodamine 6G ◽  
Glancing Angle Deposition ◽  
Nanorod Arrays ◽  
Enhanced Fluorescence ◽  
Fluorescence Study ◽  
Surface Enhanced Fluorescence ◽  
Glancing Angle ◽  
Surface Enhanced ◽  
Angle Deposition

The nanorods morphology dependence of surface-enhanced fluorescence (SEF) has been investigated for Rhodamine 6G adsorbed onto silver nanorod arrays.

scholarly journals Synthesis of Nanowire Using Glancing Angle Deposition and Their Applications

2020 ◽  
Author(s):  
Chinnamuthu Paulsamy ◽  
Pheiroijam Pooja ◽  
Heigrujam Manas Singh
Keyword(s):  
Nanowire Array ◽  
Optoelectronic Devices ◽  
Glancing Angle Deposition ◽  
Optical And Electrical Properties ◽  
Large Aspect Ratio ◽  
Glancing Angle ◽  
1D Nanostructure ◽  
Glad Technique ◽  
Angle Deposition ◽  
Nanowires Array

Nanowires are highly attractive for advanced nanoelectronics and nanoscience applications, due to its novel properties such as increased surface area, large aspect ratio, and increased surface scattering of electrons and phonons. The design and fabrication of nanowires array provide a great platform to overcome the challenges/limitation of its counter partner. This chapter focuses on the synthesis of metal oxide nanowire and axial heterostructure nanowire array using the Glancing angle deposition (GLAD) technique. The structural, optical and electrical properties are studied. This GLAD technique offers control over one-dimensional (1D) nanostructure growth with self-alignment capability. It is also reviewed in an effort to cover the various application in this area of optoelectronic devices and wettability applications that had been synthesized using GLAD.

Sign in / Sign up

Export Citation Format

Share Document