Fabrication and characterization of glancing angle deposited nanostructured surfaces for enhanced boiling heat transfer
| Autor: | Jonghyun Ju, Hyungjun Jang, Seok-min Kim, Dongin Hong, Mohsin Ali Badshah, Jun Su Park |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Critical heat flux Process Chemistry and Technology Nanotechnology 02 engineering and technology Substrate (electronics) Heat transfer coefficient 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Vacuum deposition Boiling 0103 physical sciences Heat transfer Materials Chemistry Nanorod Electrical and Electronic Engineering Composite material 0210 nano-technology Instrumentation Layer (electronics) |
| Zdroj: | Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena. 34:051803 |
| ISSN: | 2166-2754 2166-2746 |
| DOI: | 10.1116/1.4959837 |
| Popis: | Glancing angle deposition (GLAD) process has been regarded as an efficient method to fabricate nanostructured surfaces for enhanced boiling heat transfer because of its simplicity and variety of material selection. In this study, the effects of structural parameters (particularly the orientation and length of GLAD nanostructures) on boiling heat transfer were analyzed. The boiling heat transfer characteristics of Ag GLAD nanorods on a silicon substrate were examined using pool boiling experiments with deionized water. The vertical nanorod provided better performance than a slanted one, and a length of 200 nm was selected as the optimal length for maximizing the boiling heat transfer. A pool boiling critical heat flux of 20.6 W/cm2 was obtained for a 200 nm tall Ag-vertical nanostructure, and 13.6 W/cm2 was obtained for plain Ni-Ag layer on Si substrate. A 420% enhancement in the heat transfer coefficient was successfully achieved on a nanostructured surface compared to a plain Ni-Ag layer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|