• 전기화학회지
• /
• 제10권2호
• /
• pp.150-154
• /
• 2007

본 연구에서는 8족 금속 원소인 오스뮴을 중심금속으로 일차아민을 포함하고 있는 피리딘 (pyridine) 화합물을 배위시켜 착화합물을 합성하였다. 합성된 오스뮴 착화합물은 $[Os(dme-bpy)_2(ap-im)Cl]^{+/2+}$을 순환전압전류법을 포함한 다양한 전기화학분석법을 이용하여 전기적인 성질을 조사하였다. 또한 합성된 일차 아민을 갖는 오스뮴 착화합물을 이용하여 당 측정용 바이오센서를 제작하기 위하여 금 나노입자(Cold nano-particles)를 전기적 흡착방법을 이용하여 스크린 인쇄방법으로 만든 탄소반죽 전극 (Screen Printed Carbon Electrodes, SPEs) 위에 고정화를 시켰다. 당과 당 분해효소(Glucose Oxidase, GOx)를 혼합하여 발생하는 산화촉매전류를 확인하였고, 당 농도에 따라 변화하는 산화촉매전류의 양도 확인하였다. 새롭게 만들어진 바이오센서는 1 mM 과 같은 낮은 농도에서 감응할 수 있는 바이오센서에 응용할 수 있음을 확인하였다.

• 공업화학
• /
• 제32권4호
• /
• pp.403-408
• /
• 2021

본 논문에서는 얇고 유연한 평면 슈퍼 커패시터(PSC)를 스크린 인쇄된 탄소 전극에 폴리아닐린(PANI)을 코팅하여 제작하였습니다. 스크린 프린팅 방법을 사용하여 유연한 폴리에틸렌 테레프탈레이트에 탄소 잉크를 코팅한 후 희석 중합 법을 사용하여 탄소 표면에 PANI 박막을 코팅하였습니다. 서로 맞물린 구조의 얇은 유연한 PANI 전극을 폴리머겔 전해질로 조립하여 평면 모양의 슈퍼 커패시터(PSC) 장치를 만들었습니다. 상기 제조된 PANI/PSC는 매우 얇고 유연 하였으며, 10 mV/s에서 409 µF/cm²의 높은 면적 정전용량을 나타내었습니다. 이 값은 500 mV/s에서 원래 값의 46%로 유지되었습니다. 유연한 PANI/PSC는 180°의 구부러진 상태와 100번째의 반복적인 피로도 테스트에서도 82%의 높은 정전 용량 유지를 보여주었습니다.

• 센서학회지
• /
• 제19권2호
• /
• pp.149-154
• /
• 2010

Top of the alumina body which is made according to plan has been printed using a screen printer equipment in order to print an electrode pattern. The electrode is connected with the quartz crystal oscillator of the piezoelectricity method which has a piezoelectric characteristic. The pressure contact department has been experimented using three type of the teflon. The teflon is good for pressure delivery vector but it is bad restitution. So we devised the structure which inserts the metal in the teflon. Bottom of the module is connected with the signal processing department which is planned in advance and then has investigated to characteristic. Therefore we have got the best output-voltage and frequency characteristic follows in the pressure.

• 센서학회지
• /
• 제17권1호
• /
• pp.29-34
• /
• 2008

A new disposable amperometric tri-enzyme biosensor for the detection of paracetamol has been developed. The paracetamol sensors developed uses horseradish peroxidase modified screen-printed carbon electrodes (HRP-SPCEs) coupled with immobilized enzymes, tyrosinase and aryl acylamidase, prepared using a poly (vinyl alcohol) bearing styrylpyridinium groups (PVA-SbQ) matrix. Optimization of the experimental parameters has been performed and the paracetamol biosensor showed detection limit for paracetamol is as low as $100{\mu}M$ and the sensitivity of the sensor is $1.46nA{\mu}M^{-1}cm^{-2}$.

• 한국진공학회:학술대회논문집
• /
• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
• /
• pp.347.1-347.1
• /
• 2016

Screen printing is commonly used to form the electrode for crystalline silicon solar cells. However, it has caused high resistance and low aspect ratio, resulting in decrease of conversion efficiency. Accordingly, Ni/Cu/Ag plating method could be applied for crystalline silicon solar cells to reduce contact resistance. For Ni/Cu/Ag plating, laser ablation process is required to remove anti-reflection layers prior to the plating process, but laser ablation results in surface damage and then decrease of open-circuit voltage and cell efficiency. Another issue with plating process is ghost plating. Ghost plating occurred in the non-metallized region, resulting from pin-hole in anti-reflection layer. In this paper, we investigated the effect of Ni/Cu/Ag plating on the electrical properties, compared to screen printing method. In addition, phosphoric acid layer was spin-coated prior to laser ablation to minimize emitter damage by the laser. Phosphorous elements in phosphoric acid generated selective emitter throughout emitter layer during laser process. Then, KOH treatment was applied to remove surface damage by laser. At this step, amorphous silicon formed by laser ablation was recrystallized during firing process and remaining of amorphous silicon was removed by KOH treatment. As a result, electrical properties as Jsc, FF and efficiency were improved, but Voc was lower than screen printed solar cells because Voc was decreased due to surface damage by laser process. Accordingly, we expect that efficiency of solar cells could be improved by optimization of the process to remove surface damage.

• 한국생물공학회:학술대회논문집
• /
• 한국생물공학회 2000년도 추계학술발표대회 및 bio-venture fair
• /
• pp.206-207
• /
• 2000

스크린프린팅 된 탄소전극과 항체가 결합된 리포좀을 이용한 일회용 전기화학발광 면역센서를 구성하였다. 분석물질농도에 비례하여 분석물질-면역리포좀 복합체는 모세관현상에 의해 membrane strip에서 전극 상으로 전달되었고, 이 리포좀은 계면 활성제에 의해 파괴되고 신호발생에 이용되는 ruthenium이 방출되었다. 이와 같은 면역센서의 성능은 의료현장검사 혹은 자가진단에 적합할 것으로 예측된다.

• Journal of Electrochemical Science and Technology
• /
• 제15권1호
• /
• pp.152-160
• /
• 2024

In this study, ZnCo₂O₄ nanoparticles were synthesized via the coprecipitation method using different annealing temperatures from 200℃ to 800℃. By varying the treatment temperature, the morphology changed from amorphous to tetragonal, and finally to polygonal particles. As temperature increased, the sizes of the nanoparticles also changed from 5 nm at 200℃ to approximately 500 nm at 800℃. The fabricated material was used to modify the working electrode of a screen-printed carbon electrode (SPE), which was subsequently used to survey the detection performance of the antibiotic, chloramphenicol (CAP). The electrochemical results revealed that the material exhibits a good response to CAP. Further, the sample that annealed at 600℃ displayed the best performance, with a linear range of 1-300 μM, and a limit of detection (LOD) of 0.15 μM. The sensor modified with ZnCo₂O₄ also exhibited the potential for utilitarian application when the recovery in a real sample was above 97%.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
• /
• pp.461-462
• /
• 2005

In order to improve the efficiency of dye-sensitized solar cell (DSC), $TiO_2$ electrode screen-printed on transparent conducting oxide (TCO) substrate was sintered in variation with different temperature(350 to $550^{\circ}C$). $TiO_2$ electrode on fluorine doped tin oxide (FTO) glass was assembled with Pt counter electrode on FTO glass. I-V properties of DSC were measured under solar simulator. Also, effect of sintering temperature on surface morphology of $TiO_2$ films was investigated to understand correlation between its surface morphology and sintering temperature. Such surface morphology was observed by atomic force microscopy (AFM). From the measurement results, at sintering temperature of $500^{\circ}C$, both efficiency and fill factor of DSC were mutually complementary, enhancing highest fill factor and efficiency. Consequently, it was considered that optimum sintering temperature of $\alpha$-terpinol included $TiO_2$ paste is at $500^{\circ}C$.

• 분석과학
• /
• 제29권1호
• /
• pp.35-42
• /
• 2016

A new nano-composite carbon ink for the development of disposable dopamine (DA) biosensors based on screen-printed carbon electrodes (SPCEs) is introduced. The method developed uses SPCEs coupled with a tyrosinase modified nano-composite carbon ink. The ink was prepared by an “in-house” procedure with reduced graphene oxide (rGO), Pt nanoparticles (PtNP), and carbon materials such as carbon black and graphite. The rGO-PtNP carbon composite ink was used to print the working electrodes of the SPCEs and the reference counter electrodes were printed by using a commercial Ag/AgCl ink. After the construction of nano-composite SPCEs, tyrosinase was immobilized onto the working electrodes by using a biocompatible matrix, chitosan. The composite of nano-materials was characterized by X-ray photoelectron spectroscopy (XPS) and the performance characteristics of the sensors were evaluated by using voltammetric and amperometric techniques. The cyclic voltammetry results indicated that the sensors prepared with the rGO-PtNP-carbon composite ink revealed a significant improvement in electro-catalytic activity to DA compared with the results obtained from bare or only PtNP embedded carbon inks. Optimum experimental parameters such as pH and operating potential were evaluated and calibration curves for dopamine were constructed with the results obtained from a series of amperometric detections at −0.1 V vs. Ag/AgCl. The limit of detection was found to be 14 nM in a linear range of 10 nM to 100 µM of DA, and the sensor’s sensitivity was calculated to be 0.4 µAµM⁻¹cm⁻².

• 한국인쇄학회지
• /
• 제30권3호
• /
• pp.45-56
• /
• 2012

Printing technology is accepted by appropriate technology that smart phones, tablet PC, display(LCD, OLED, etc.) precision recently in the electronics industry, the market grows, this process in the ongoing efforts to improve competitiveness through the development of innovative technologies. So printed electronics appeared by new concept. This technology development is applied on electronic components and circuits for the simplification of the production process and reduce processing costs. Low-temperature process making possible for widening, slimmer, lighter, and more flexible, plastic substrates, such as(flexible) easily by forming a thin film on a substrate has been studied. In the past, the formation of the electrode used a screen printing method. But the screen printing method is formation of fine patterns, high-speed printing, mass production is difficult. The roll-to-roll printing method as an alternative to screen printing to produce electronic devices by printing techniques that were used traditionally in the latest technology and processing techniques applied to precision control are very economical to implement fine-line printing equipment has been evaluated as. In order to function as electronic devices, especially the dozens of existing micro-level of non-dot print fine line printing is required, the line should not break at all, because according to the specifications required to fit the ink transfer conditions should be established. In this study of roll-to-roll printing conductive paste suitable for gravure offset printing by developing Ag paste for forming fine patterns to study the basic physical properties with the aim of this study were to.