Materials Literature
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Copper nitride (Cu3N) thin films were deposited at 300 degrees C on glass substrates by reactive magnetron sputtering method with changing various nitrogen flow rates. The results showed that the nitrogen flow rate has a significant effect on the properties of the Cu3N thin films. XRD data exhibited that two phases of…
In this research, we quantified the environmental load while using and not using secondary resources. During the process of primary processed product of metal resources (copper, aluminum), we applied LCA technique and analyzed by dividing into 8 environmental impact categories that affect the environment. Furthermore,…
Monolayers and Langmuir-Blodgett (LB) films of pyridyldithio-functionalized multiwalled carbon nanotubes (pythio-MWNTs) conjugated with cytochrome c were investigated. Quartz crystal microbalance measurements revealed that monolayers of pythio-MWNTs could be deposited on the substrate surface with a surface density of…
A new synthetic route for decorating carbon nanotubes (MWCNTs) with silver nanoparticles by proton beam irradiation at room temperature is presented. Pristine- and surface-modified MWCNTs were comparatively utilized for the preparation of MWCNT-Ag-nanoparticles nanohybrid. Silver nanoparticles on the surfaces of MWCNT…
We have investigated gate electric field controlled Rashba spin-orbit coupling (SOC) constant (alpha) in In0.53Ga0.47As and InAs-inserted quantum well (QW) structures. More than three times larger gate controllability of a in the InAs-inserted QW has been observed compared to the In0.53Ga0.47As QW. The enhanced gate c…
The spectroscopic and laser properties of bulk Bridgman-grown Zn1-xMgxSe single crystals with the various concentrations of Mg (x=0.19; x=0.27; x=0.38) were investigated in the wide temperature range. The pumping was provided by a 2.94 μm Q-switched Er:YAG laser with a maximal energy of 15 mJ in 120 ns pulse, repetiti…
Abstract The new water-soluble complex [RuH(OOc)( m tppms) 3 ] (OOc=octanoate, m tppms=monosulfonated triphenylphosphine) was synthesized and – together with the known [RuH(OAc)( m tppms) 3 ] (OAc=acetate) – applied for aqueous-organic biphasic hydrogenation of cinnamaldehyde as well as for hydrogenation of soybean li…
보상식 화재 감지기는 일정한 온도 상승률 이상으로 빠르게 상승하는 경우에 작동하는 차동식 화재 감지기의 기능과 정온점에 이르렀을 때 작동하는 정온식 화재 감지기의 기능을 모두 가진 감지기다. 이 화재 감지기는 정온점 이하에서 발생하는 화재를 감지하지 못하는 정온식 화재 감지기의 단점과 불꽃없이 천천히 타는 현상과 같이 천천히 열이 증가하는 화재를 감지하지 못하는 차동식 화재 감지기의 단점을 보완하기 위해 개발된다. 이것을 위해 우리는 이 감지기의 센서로 금속-절연체 전이 임계온도센서를 이용했는데 이 센서의 감도를 결정하는 저항온도계수가 $55^{\circ}C$ 일…
다공성의 활성탄소와 상대적으로 입자크기가 더 작은 carbon black을 여러 비율로 혼합하여 다양한 적층배열 구조를 갖는 축전식 탈염용 전극을 제조하였고 활성탄소만 존재하는 전극과 비교 분석하였다. 연구 결과 carbon black의 양이 증가할수록 탄소체의 배열 구조가 조밀해지는 것을 관찰하였고, mesopore가 약 10% 증가하는 것으로 나타났다. 순환전압전류법을 이용하여 축전용량을 살펴보았을 때 carbon black만으로는 이온흡착에 대한 영향이 거의 없지만 활성탄소체와 혼합하여 carbon black의 양이 증가할수록 비축전용량 역시 증가하는 것을 관…
This study proposed a revision of standard sizing system for infant clothing to provide exact information for consumers and manufacturers. The size designation was set up by compensating the defect of existing system. Basic body measurement and reference body measurement were analysed according to size designation. Th…
In this study 100 %cotton denim fabric was treated with herbal combinations of Amanakku, Amman Paccharisi and Avaram by dip method, micro-encapsulation and nano-encapsulation by pad dry cure technique. The treated fabric was analyzed for the change in Wicking behavior of 10, 20, and 30 washes using T test. The results…
Composite membranes from chitosan blended with different ratios of chitosan were developed for the pervaporation of methanol/methyl tert-butyl ether mixtures. The composite membranes were characterized for surface morphology and sorption. Surface morphology showed chitosan and PVA were homogenously blend for all chito…
The performance of five kind adsorbents, which can reduce nitrogen oxide (NOx) from the diesel engine occupying 85% of the fishing boat, was carried out and the emission reduction filter was manufactured and evaluated in the adsorption efficiency of the emission gas for 240 KW diesel portable generator. As a NOx emiss…
다양한 공정 조건으로 $SiN_x$ 와 $SiO_2$ 박막을 형성하고 이에 대한 패시베이션 특성에 대한 연구를 수행하였다. Plasma enhanced chemical vapor deposition(PECVD)을 이용하여 증착된 $SiN_x$ 박막의 경우, 증착 두께가 증가함에 따라 페시베이션 특성이 향상되는 것을 관찰하였다. 이는 PECVD 증착 공정 중 유입되는 수소 원자들이 실리콘 표면에 존재하는 Dangling bond와 결합하여 소수 캐리어의 재결합 현상을 효과적으로 감소시켰기 때문이다. 건식 산화법으로 형성된 $SiO_2$ 박막은 습식 산화법으로 형성된…
A superhydrophobic polypropylene (PP) coating on the surface of aluminum alloy coupons is unstable because of the existence of metastable state in curing process. Nano-titania particles were added into PP solution to form hierarchical micro- and nano-structures of PP coatings on the surface of aluminum alloy coupons.…
Multi-walled carbon nanotubes were synthesized using a mixture of toluene and ferrocene. Synthesized nanomaterial was characterized with the help of electron microscopes. Carbon nanotubes were used for the removal of anionic dye amido black from water. Effect of dye concentration, contact time and pH were also investi…
Copper (Cu) fine particles were prepared by room-temperature hydrazine reduction of Cu oxide microparticles. In this study, to reveal the formation process of metallic Cu homogeneous fine particles from cupric oxide (CuO) microparticles, hydrazine was added to a CuO slurry at room temperature. The morphological change…
When vertically aligned carbon nanotubes (VACNTs) are synthesized by thermal chemical vapor deposition (TCVD), their structural features such as height and density can be determined by TCVD growth conditions. In this study we investigated the effect of growth pressure on the structural features of VACNTs. Changes in g…
Using poly(3-hexylthiophene) (P3HT) covalently bonded with carbon nanotubes (CNT) as an active layer in a bottom-gate/top contact, Au/(P3HT)/(bilayer dielectric)/Si OTFT device has resulted in an enhanced charge transport. The CNTs were firstly functionalized via ligand exchange with ferrocene, next lithiated by sec-b…
In this work, shape-controlled synthesis of zinc oxide (ZnO) microstructures were demonstrated using liquid-phase route utilizing zinc acetate hydrate as zinc ion precursor and ammonia as pH buffering agent and source for zinc-ammonia complexes. Glass substrate coated with indium tin oxide layer was used as the growth…