Abstract:
A spectral sensor for surface-enhanced raman scattering is provided to adjust geometric structure where the position of an individual nanowire and multiple nanowires forms using a noble metal monocrystal nanowire of high quality, high purity, and complicated shape. An optical sensor comprises a substrate, a noble metal thin film placed on top of the substrate; and a monocrystal noble metal nanowire positioned on top of the noble metal nanowire. A hot spot is formed between the noble metal thin film and the noble metal nanowire. Surface-enhanced raman scattering is reinforced by local electromagnetic field created in the hot spot.
Abstract:
본 발명은 신경세포 또는 신경세포를 포함하는 생체조직 내로 삽입되어 상기 신경세포 또는 신경세포를 포함하는 생체조직으로부터의 전기신호를 수신하는 단결정 금 나노선; 및 상기 금 나노선을 지지하여 고정시키고 생체내 상기 전기신호를 외부로 전달하며, 표면이 노출되지 않도록 절연체로 코팅된 금속 팁;을 포함하는, 신경신호 측정용 신경전극에 관한 것으로, 상기 신경전극은 소형화로 인해 양호한 기계적 특성 및 높은 전기전도성과 공간 분해능을 가진다.
Abstract:
PURPOSE: A Fabry-Perot laser diode(FP-LD) simulation method and a device are provided to reduce calculation time by using a gain calculation formula used in a semiconductor optical amplifier. CONSTITUTION: A FP-LD simulation device applies the average of a calculated gain and a loss and phase change during a round-trip to the whole samples of injected light(S150). The FP-LD simulation device forms composite light by adding the whole samples of the injected light to the whole samples in which a phase change is applied. The FP-LD simulation device performs round-trip a number of times which the number of the whole samples of the injected light is divided into samples included in round-trip. The FP-LD simulation device outputs the loss and the phase change in the last round-trip by applying the same to the whole samples of the light performing the last round-trip. [Reference numerals] (AA) Start; (BB) Yes; (CC) No; (DD) End; (S110) Injecting external light(field) i=0; (S117) Applying a calculated whole gain to a whole field; (S120) Roundtrip (i=i+1); (S130) Calculating the gain a roundtrip sample; (S140) Applying the average of the gain to the whole field; (S150) Applying mirror loss and phase change to the whole field; (S160) Injecting external light(field); (S180) Applying the mirror loss and combination efficiency and outputting
Abstract:
PURPOSE: A method for manufacturing metal silicide nanowire is provided to simply obtain plenty of the metal silicide nanowire and adjusting the composition of the metal silicide nanowire in a wide range. CONSTITUTION: Single crystalline silicon metal nanowire(100) is synthesized using a vapor-phase transporting method. The synthesized silicon metal nanowire is annealed under oxygen atmosphere, and a silicon oxide layer(110) is formed on the surface of the silicon metal nanowire. The silicon oxide layer is eliminated using a wet etching method. A metal-rich single crystalline silicon metal nanowire, which is an intermetallic compound or a solid solution is prepared.
Abstract:
PURPOSE: A single-crystal twin-free noble metal nanowire and a manufacturing method thereof using noble metal halide are provided to control the orientation of the noble metal nanowire formed on a substrate by controlling the temperature of a precursor using the noble metal halide. CONSTITUTION: A manufacturing method of a single-crystal twin-free noble metal nanowire comprises the following steps: locating a noble metal halide as a precursor to the tip-end of a reactor and locating a mono crystal substrate on the rear side of the reactor; and heat processing the reactor from the tip-end to the rear side thereof under fixed pressure and inert gas, to form noble metal nanowires having an epitaxial relation with the substrate on the mono crystal substrate.
Abstract:
분석 대상이 포함하고 있는 화학적 또는 생물학적 물질의 존재 또는 함량을 검출하기 위해, 레이저 빔 및 라만 분광 검출기와 함께 사용되기 위한 광센서로, 상기 광센서는 단결정의 귀금속 나노와이어를 포함하여 구성되며, 귀금속 박막과 귀금속 나노와이어의 접점 또는 개별 귀금속 나노와이어 사이의 접점에서 형성된 강한 국소전기장(핫 스팟, hot spot)에 의하여 표면 증강 라만 산란이 증강되는 특징이 있다. 본 발명의 표면 증강 라만 분광(SERS; Surface-Enhanced Raman Scattering)용 광 센서는 고품질, 고순도 및 고형상의 귀금속 단결정 나노와이어를 사용하여 인-시츄(in-situ)로 측정이 가능하고 센서의 조사된 레이저 빔과 반응하는 부분이 조절된 구조 및 형상을 가질 수 있으며 조절 가능한 핫 스팟을 가져 신뢰성 및 재현성이 뛰어난 장점이 있고, 센서의 민감도를 향상시킬 수 있으며, 단일한 귀금속 단결정 나노와이어의 기계적 구조 및 레이저 빔의 편광 방향을 최적화하여 민감도, 선택도 및 회절 강도가 높은 장점이 있다. 또한 본 발명의 표면 증강 라만 분광용 광 센서는 귀금속 나노와이어 표면에 나노-바이오 하이브리드 구조를 형성하여 바이오 물질에 대한 고감도의 라만 스펙트럼을 얻을 수 있어, 화학물질의 검출 센서는 물론, 바이오 센서 또는 질병 진단용 센서로 활용될 수 있는 장점이 있다. 표면 증강 라만 산란(Surface-Enhanced Raman Scattering), 라만 스펙트럼 (Raman spectrum), 귀금속 나노와이어(noble metal nanowire), 표면 플라즈몬(surface plasmon), 바이오 센서(bio sensor)
Abstract:
A method for manufacturing iron cobalt silicide nanowires is provided to produce high-purity and high-quality single crystal iron cobalt silicide(Fe_(1-x)Co_xSi) having physical properties suitable for applications to nano devices. An iron cobalt silicide single crystal nanowire has a composition of Fe_(1-x)Co_xSi, wherein x is a value ranging from 0.01 to 0.99. A method for manufacturing the iron cobalt silicide single crystal nanowire includes a step of heat-treating a precursor placed at the front end part of a reactor and a silicon substrate placed at the rear end part of the reactor under an inert gas atmosphere to form the Fe_(1-x)Co_xSi nanowire on the silicon substrate, wherein the precursor is a mixture of cobalt halide and iron halide. Further, the nanowire is ferromagnetic material and has helical spin order.