Fabrication of a Micro/Nano Integrated Roughened Structure Using Nanosphere Lithography (NSL)

2004 ◽  
Author(s):  
Abel L. Thangawng ◽  
Junghoon Lee
Keyword(s):  
Plasma Etching ◽  
Superhydrophobic Surface ◽  
Design Procedure ◽  
Nanosphere Lithography ◽  
Experimental Results ◽  
Water Repellent ◽  
Fabrication Technology ◽  
Lotus Leaf ◽  
Double Structure ◽  
On Chip

This paper presents a fabrication technology to create a double roughened PDMS structure for a superhydrophobic surface. The fabricated surface has many application potentials, including on-chip micro liquid processor and water repellent coating. Similar structure can be found in nature on a lotus leaf (Fig. 1.) Due to its superhydrophobic surface, lotus leaf repels water and in the process performs self-cleaning [1]. In this paper, we show the combination of Nanosphere Lithography (NSL), plasma etching, and molding technique to create the micro/nano integrated double structure using PDMS. Also described is the design procedure and experimental results for the double-structured superhydrophobic surface.

Fabrication of Super Water-Repellent Surfaces by Nanosphere Lithography

2004 ◽  
Vol 823 ◽  
Author(s):  
Jau-Ye Shiu ◽  
Chun-Wen Kuo ◽  
Peilin Chen ◽  
Chung-Yuan Mou
Keyword(s):  
Plasma Etching ◽  
Oxygen Plasma ◽  
Nanosphere Lithography ◽  
Contact Angles ◽  
Adjustable Parameter ◽  
Superhydrophobic Surfaces ◽  
Water Repellent ◽  
Water Contact ◽  
Polystyrene Nanospheres ◽  
Plant Surfaces

Abstract: Inspired by the water-repellent behavior of the micro- and nano-structured plant surfaces, superhydrophobic materials, with a water contact larger than 150° superhydrophobic surfaces using a combination of nanosphere lithography and plasma etching. It has been found that the water contact angle on these surfaces can be systematically tuned from 132° to 168° by trimming the diameters of polystyrene nanospheres using oxygen plasma. The water contact angles measured on these surfaces can be modeled by the Cassie's formulation without any adjustable parameter.

Water-Repellent Stability of Superhydrophobic Materials under Hydrostatic Pressure

2014 ◽  
Vol 633-634 ◽  
pp. 764-768
Author(s):  
Jian Ye Huang ◽  
Feng Hui Wang
Keyword(s):  
Hydrostatic Pressure ◽  
Superhydrophobic Surface ◽  
Hierarchical Structures ◽  
Water Repellency ◽  
Total Reflection ◽  
Wetting Transition ◽  
Water Repellent ◽  
Lotus Leaf ◽  
Stability Of Water ◽  
Air Film

Keeping the water-repellent stability of superhydrophobic surface is necessary in application. Based on the total reflection of Cassie interface and vacuum technique, the superhydrophobic stability of the lotus leaf and an artificial material was investigated. The results show that during the Cassie-Wenzel transition, primary wetting transition occurs at a certain pressure that in accordance with theoretical prediction. However, when the air film is entrapped between microstructures, stability of water-repellency was greatly enhanced, and part of the wetting transition can be recovered when the pressure was released. Due to the micro-and nanoscale hierarchical structures, the lotus leaf shows better water-repellent stability and dewetting property than the artificial superhydrophobic surface when the hydrostatic pressure was applied and released.

ОСОБЕННОСТИ АРХИТЕКТУРЫ И ОСНОВНЫЕ ХАРАКТЕРИСТИКИ АППАРАТНОГО ВИДЕОКОДЕКА СТАНДАРТА H.264 В СОСТАВЕ МИКРОСХЕМЫ 1892ВМ14Я

2020 ◽  
Vol 96 (3s) ◽  
pp. 89-96
Author(s):  
А.А. Беляев ◽  
Я.Я. Петричкович ◽  
Т.В. Солохина ◽  
И.А. Беляев
Keyword(s):  
Data Flow ◽  
System On Chip ◽  
Video Codec ◽  
Experimental Results ◽  
Video Sequences ◽  
Ip Core ◽  
Performance Measurements ◽  
Synchronization Mechanism ◽  
Architectural Features ◽  
On Chip

Рассмотрены особенности архитектуры и основные характеристики аппаратного видеокодека по стандарту H.264, входящего в состав микросхемы 1892ВМ14Я (MCom-02). Описан механизм синхронизации потоков данных на основе набора флагов событий. Приведены экспериментальные результаты измерения характеристик производительности разработанного видеокодека на реальных видеосюжетах при различных форматах передаваемого изображения. The paper considers main architectural features and characteristics of H.264 hardware video codec IP-core as a part of MCom- 02 system-on-chip (SoC). Bedides, it presents data flow synchronization mechanism based on event flags set, as well as experimental results of performance measurements for the designed video codec IP-core obtained for different video sequences and different image formats.

Controllable fabrication of lotus-leaf-like superhydrophobic surface on copper foil by self-assembly

2014 ◽  
Vol 116 (4) ◽  
pp. 1613-1620 ◽  
Author(s):  
Zhiqing Yuan ◽  
Xian Wang ◽  
Jiping Bin ◽  
Menglei Wang ◽  
Chaoyi Peng ◽  
...  
Keyword(s):  
Self Assembly ◽  
Superhydrophobic Surface ◽  
Copper Foil ◽  
Lotus Leaf ◽  
Controllable Fabrication

Research on Characteristics of the Photovoltaic Cells Integrated on Chip

2014 ◽  
Vol 525 ◽  
pp. 287-291
Author(s):  
Li Xian Xiao ◽  
Yong Tai He ◽  
Yue Hong Peng ◽  
Jin Hao Liu
Keyword(s):  
Conversion Efficiency ◽  
Doping Concentration ◽  
Photovoltaic Cells ◽  
Influence Factors ◽  
Device Layer ◽  
Fabrication Technology ◽  
Junction Depth ◽  
On Chip ◽  
Substrate Doping ◽  
Emitter Junction

The influence factors of Photovoltaic (PV) cells characteristics integrated on chip were analyzed based on the fabrication process and the structure of the PV cells and CMOS devices. The results show the substrate doping concentration, the emitter doping concentration, the emitter junction depth and the thickness of device layer directly determine the conversion efficiency, open voltage and the light-generated current of photovoltaic cells. In the emitter doping concentration range of 1×1019/cm3 to 1×1021/cm3 and the substrate doping concentration range of 1.0×1015/cm3 to 1.0×1017/cm3, the Photovoltaic cells have batter conversion characteristics. The PV cells were designed based on the analysis results in PC1D, and the conversion efficiency is 9.43%. The Photovoltaic cells and the CMOS devices have batter fabrication technology compatibility integrated on chip.

A Novel Adaptive Routing Algorithm for Network-On-Chip

2011 ◽  
Vol 474-476 ◽  
pp. 413-416
Author(s):  
Jia Jia ◽  
Duan Zhou ◽  
Jian Xian Zhang
Keyword(s):  
Routing Algorithm ◽  
Adaptive Routing ◽  
Network On Chip ◽  
Experimental Results ◽  
Average Latency ◽  
On Chip

In this paper, we propose a novel adaptive routing algorithm to solve the communication congestion problem for Network-on-Chip (NoC). The strategy competing for output ports in both X and Y directions is employed to utilize the output ports of the router sufficiently, and to reduce the transmission latency and improve the throughput. Experimental results show that the proposed algorithm is very effective in relieving the communication congestion, and a reduction in average latency by 45.7% and an improvement in throughput by 44.4% are achieved compared with the deterministic XY routing algorithm and the simple XY adaptive routing algorithm.

Fabrication of GaN nanorods by inductively coupled plasma etching via SiO2 nanosphere lithography

2009 ◽  
Vol 517 (14) ◽  
pp. 3859-3861 ◽  
Author(s):  
Byung-Jae Kim ◽  
Hyunjung Jung ◽  
Hong-Yeol Kim ◽  
Joona Bang ◽  
Jihyun Kim
Keyword(s):  
Plasma Etching ◽  
Inductively Coupled Plasma ◽  
Nanosphere Lithography ◽  
Inductively Coupled Plasma Etching ◽  
Inductively Coupled

scholarly journals A new ZCZVT commutation cell for PWM DC-AC converters

2004 ◽  
Vol 15 (2) ◽  
pp. 162-171 ◽  
Author(s):  
C. M. de O. Stein ◽  
H. L. Hey ◽  
J. R. Pinheiro ◽  
H. Pinheiro ◽  
H. A. Gründling
Keyword(s):  
Design Procedure ◽  
Experimental Results ◽  
Cell Design ◽  
Load Range ◽  
Switching Operation ◽  
Full Load ◽  
Turn On ◽  
Zero Current ◽  
Ac Converters ◽  
Zero Voltage

This paper proposes a new auxiliary commutation cell for PWM inverters that allows the main switches to be turned on and off at zero voltage and zero current. The main switches zero current turn-on reduces the undesired effects of parasitic inductances related to the circuit layout. The main diodes reverse recovery losses are minimized since di/dt and dv/dt are controlled. The ZCZVT commutation cell is located out of the main power path of the converters and is activated only during switching transitions. Additionally, the auxiliary switches are turned on and off at ZCS and use the same ground signals of the upper main switches. The commutation losses are practically reduced to zero. Soft switching operation is guaranteed for full load range without changes in command strategy. The operation of the ZCZVT PWM full-bridge DC-AC Converter is analyzed and an auxiliary commutation cell design procedure based on the analysis is proposed. Experimental results are presented to demonstrate the feasibility of the proposed commutation cell.

Preparation of organic–inorganic hybrid methylene blue polymerized organosilane/sepiolite pigments with superhydrophobic and self-cleaning properties

2019 ◽  
Vol 89 (19-20) ◽  
pp. 4220-4229 ◽  
Author(s):  
Shengtao Wu ◽  
Jinliang Huang ◽  
Haishuai Cui ◽  
Tian Ye ◽  
Fang Hao ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Natural World ◽  
Shielding Effect ◽  
Water Repellent ◽  
Inorganic Hybrid ◽  
Lotus Leaf ◽  
Spider Web ◽  
Chemical Inertness ◽  
Optical Stability ◽  
Self Cleaning

Inspired by the self-cleaning and water-repellent properties of the lotus leaf in the natural world, a kind of organic–inorganic hybrid pigment with superhydrophobic properties was prepared by adsorption of cationic methylene blue (MB) azo dyes onto acid-treated sepiolite (SEP), and then a superhydrophobic functional group of polymerized organosilanes (POSs) obtained from hexadecyltrimethoxysilane (HDTMS) and tetraethoxysilane (TEOS) was introduced onto the composite pigments (MB/SEP). The excellent chemical, thermal and optical stability of MB@POS/SEP are due to the shielding effect caused by the chemical inertness of the POS sheet. Furthermore, the superhydrophobic MB@POS/SEP pigments show an extraordinary self-cleaning property, which is similar to the waterproof property of the lotus leaf and spider web. The superhydrophobicity is strongly linked to their chemical composition and morphology, which can be adjusted by varying the concentration of HDTMS and TEOS. This kind of superhydrophobic pigment can be applied in various fields, such as ceramics, building and daily necessities.

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