• Applied Chemistry for Engineering
• /
• v.20 no.6
• /
• pp.586-592
• /
• 2009

The preparation of structures with nanosized arrays allows mimicking many different morphologies that exist in nature. In addition, polymer is considered as a material that can be easily applicable to the fabrication of nanostructures and can effectively exhibit nanosize effects since material, synthesis and processing cost is low, and many of polymer structures are well studied. Porous alumina template prepared by anodization of aluminum among nanofabrication methods is the one of promising routes that cost-effectively provides very regularly arrayed nanostructures. In this review, we describe the fabrication of the nanotemplate and template-based polymer nanostructures and their applications.

• Korean Journal of Materials Research
• /
• v.18 no.12
• /
• pp.655-659
• /
• 2008

The NO gas sensing properties of ZnO-carbon nanotube (ZnO-CNT) composites fabricated by the coaxial coating of single-walled CNTs with ZnO were investigated using pulsed laser deposition. Upon examination, the morphology and crystallinity of the ZnO-CNT composites showed that CNTs were uniformly coated with polycrystalline ZnO with a grain size as small as 5-10 nm. Gas sensing measurements clearly indicated a remarkable enhancement of the sensitivity of ZnO-CNT composites for NO gas compared to that of ZnO films while maintaining the strong sensing stability of the composites, properties that CNT-based sensing materials do not have. The enhanced gas sensing properties of the ZnO-CNT composites are attributed to an increase in the surface adsorption area of the ZnO layer via the coating by CNTs of a high surface-to-volume ratio structure. These results suggest that the ZnO-CNT composite is a promising template for novel solid-state semiconducting gas sensors.

• 한국초전도학회:학술대회논문집
• /
• v.16
• /
• pp.82-82
• /
• 2006

• 한국초전도학회:학술대회논문집
• /
• 2008.08a
• /
• pp.71-71
• /
• 2008

• Proceedings of the Korean Vacuum Society Conference
• /
• 2003.08a
• /
• pp.178-178
• /
• 2003

• Proceedings of the Korean Vacuum Society Conference
• /
• 2002.06a
• /
• pp.130-130
• /
• 2002

• Applied Chemistry for Engineering
• /
• v.29 no.3
• /
• pp.253-257
• /
• 2018

DNA metallization has been emerged as a candidate for fabricating nanocircuits because of its simple process over a large area on a surface. With unique properties, DNA can be an excellent template to achieve molecular electronics. Thus, we introduced the preparation and properties of DNA metallization, and also suggested future directions in this review.

• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.1495-1496
• /
• 2011

Anodic aluminum oxide (AAO) nanotemplates for nano electronic device applications have been attracting increasing interest because of ease of fabrication, low cost process, and possible fabrication in large area. The size and density of the nanostructured materials can be controlled by changing the pore diameter and the pole density of AAO nanotemplate. In this paper, AAO nanotemplate was fabricated by second anodization method. In addition, effects of electrolyte and anodization voltate on the microstructure of porous alumina films were investigated. Vertically well aligned pores had the average pore sizes of 15-70 nm and the length of approximately 40 ${\mu}m$.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2002.07b
• /
• pp.830-833
• /
• 2002

최근 나노 구조 (nano structure)를 만들기 위한 시도 중 하나로서 스스로 조직화(self organization)하여 나노 구조를 형성하는 물질을 나노 소자 제작을 위한 형틀 (template)로 이용하려는 시도가 활발히 진행되고 있다. 이러한 물질로서 주목을 받고있는 것 중 하나가 전해질 용액에서 알루미늄을 양극산화(anodization) 시켰을 때 형성되는 다공성 알루미나 박막이다. 본 연구에서는 고 순도 알루미늄을 기계적으로 연마(mechanical polishing)하고 공기 분위기에서 어닐링 (annealing)하여 알루미늄을 재결정화(recrystallization) 시키고 인가 전압이 40 V인 정 전압하에서 0.3 M의 수산(oxalic acid)을 전해질로 사용하면서 양극산화를 수행하여 평균 직경이 65 nm인 고도로 배열된 육방밀집구조의 나노 다공성 박막을 제작하였다. 또한 같은 방향의 육방밀집 배열은 크기가 수 ${\mu}m$인 영역(grain)을 형성하고 있었으며, 평균적인 pore의 밀도는 $1.1{\times}10^{10}/cm^2$였다.

• Macromolecular Research
• /
• v.15 no.6
• /
• pp.575-580
• /
• 2007

Water-soluble, chiral conducting, poly(diphenylamine) (PDPA) nanocomposites were synthesized by chemical oxidative polymerization of diphenylamine in the presence of poly(acrylic acid) (PAA) as a template and camphor sulphonic acid (CSA) as the chiral inductor, Composites were formed as stable aqueous dispersions under different experimental conditions, such as DPA to PAA molar ratios, PAA molecular weight, etc. Circular dichroism(CD) spectra of the composites indicated the induction of chirality to PDPA. Compared to simple chiral PANI, the PDPA/PAA/CSA nanocomposites showed a different Cotton effect. The appearance of a CD band in the composite was complimentary to the bisignate, exciton-coupled band in the UV-Visible spectrum. FTIR spectra indicated the intimate mixing of PDPA and PAA.