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Biodevices composed of biomolecular layer have been developed in various fields such as medical diagnosis, pharmaceutical screening, electronic device, photonic device, environmental pollution detection device, and etc. The biomolecules such as protein, DNA and pigment, and cells have been used to construct the biodevices such as biomolecular diode, biostorage device, bioelectroluminescence device, protein chip, DNA chip, and cell chip. Substantial interest has focused upon thin film fabrication or the formation of biomaterials mono- or multi-layers on the solid surfaces to construct the biodevices. Based on the development of nanotechnology, nanoscale fabrication technology for biofilm has been emerged and applied to biodevices due to the various advantages such as high density immobilization and orientation control of immobilized biomolecules. This review described the nanoscale fabrication of biomolecular film and its application to bioelectronic devices and biochips.
A hybrid Ad-hoc network connected to the Internet needs an IP address configuration to communicate with the Internet. Most of proposed address autoconfiguration algorithms are node based. The node based address autoconfiguration algorithms waste bandwidth and consume much battery in mobile ad-hoc networks. In this paper, we propose the address allocation algorithm in hybrid Mobile ad-hoc network (MANET). The proposed algorithm reduces network traffic by transferring address configuration packet to the internet gateway by unicast method. Moreover, our IP address configuration algorithm also reduces battery consumption and address configuration time by decreasing number of configuration packets on internet gateway. 인터넷과 연결되어 있는 하이브리드 애드혹 네트워크가 통신을 하기 위해서는 IP주소의 설정이 필요하다. 기존에 제안된 대부분의 주소 설정방법은 노드를 중심으로 설정을 한다. 노드 중심의 주소 설정 방법은 애드혹 네트워크 내에서 네트워크의 대역폭을 낭비하고 많은 배터리를 소모해서 비효율적이다. 본 논문에서는 인터넷 게이트웨이를 중심으로 한 효율적인 주소설정방법을 제안한다. 본 논문에서 제안하는 방법은 노드에서의 주소 설정 패킷을 유니캐스트 방식으로 전송하여 네트워크 트래픽을 줄인다. 또한, 인터넷 게이트웨이의 주소 설정 알고리즘을 통해서 교환하는 패킷의 수를 줄여 배터리 소모를 줄이고 주소설정 시간을 감소시킨다.
The molecular rectier consisting of protein heterolayer is investigated in molecular-scale for the construction of bioelectronicdevice. Cytochromec and green uorescence protein were used as an electron acceptor and a sensitizer in the molecular layer bymimicking the bacterial photosynthesis. Self-assembled monolayer of thiol-modied cytochromec was formed on Au coated glass,and then green uorescence protein was adsorbed onto the cytochromec surface by electrostatic attraction. The formation of cyto-chromec layer onto the Au substrate and green uorescence protein adsorption onto the cytochromec layer were observed by thesurface plasmon resonance measurement. The surface of heterolayer was observed and analyzed by the scanning tunneling micro-scopy. The rectifying property of proposed heterolayer was achieved by the scanning tunneling spectroscopy based currentvoltagemeasurement. Finally, the molecular rectifying property was veried.
The self-assembly layer consisting of fusion protein is investigated in molecular-scale for the construction of bioelectronic device.Cytochromeb562 and green uorescent protein were used as an electron acceptor and a sensitizer in the molecular layer by mim-icking the photosynthesis. Self-assembled monolayer of fusion protein was formed on Au coated glass. The formation of fusion pro-tein layer onto the Au substrate was observed by the surface plasmon resonance measurement. The surface of fusion protein layerwas observed and analyzed by the scanning tunneling microscopy observation. For embodiment of the molecular electronic device,molecular arrays of fusion protein SA layer were formed by micro contact printing. Surface charge distribution of fusion protein SAlayer was measured to conrm an electrical conductivity by electrostatic force microscopy observation.
The spectroscopic features observed in laterally self-aligned InGaAs/GaAs quantum dots (QDs)are compared with those in isolated QDs. Though each aligned QD keeps an individual appearance analogous to that of an isolated QD, the aligned QD shows a unique spectroscopic anisotropy attributed to coupling. The polarized photoluminescence (PL) intensity parallel to the alignment of the QDs is distinctively enhanced, which supports the anisotropic arrangement in a preferential  direction as shown by the atomic force microscopic image. The temperature dependence of the PL emission energy is exceptionally redshifted, in contrast with the excitation-power dependence that shows a blueshift behavior, which may possibly be explained by the carrier redistribution in anisotropically coupled QDs.