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나원주 대한양계협회 1988 월간 양계 Vol.20 No.2
가공용 닭고기 수요개발을 통한 소비확대에 많은 가공용품의 관심이 요구된다.
Highly sensitive copper nanowire conductive electrode for nonenzymatic glucose detection
나원주,이정섭,전재문,김우영,김윤기,장정식 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.69 No.-
Commercial diabetes test strips, patterned with a carbon paste, has poor durability and preservability because of using enzyme. Furthermore, carbon paste needs sintering process to get proper conductivity. Therefore, alternative conductive ink and sensing materials are the research theme under consideration lately. Therefore, we demonstrated constructing copper nanowire paste glucose sensor strip (CuNW_GSS) platform to diagnose diabetes nonenzymatically. Copper nanowires (CuNWs) were fabricated by a simple hydrothermal method with a capping agent to preserve the CuNWs from oxidation. Moreover, the CuNW paste could be easily utilized without sintering, and this fabricated paste successfully substituted for the commercial carbon paste pattern due to its high conductivity. CuNWs were used as not only the composition of conductive copper paste but also the sensing material for detecting glucose, which grants high charge transport ability to the glucose sensor, leading to high sensing ability. The limit of detection (LOD) of the CuNW_GSS was 1 nM, which is 40 times higher sensitivity than those of other glucose sensors and the CuNW_GSS also exhibited excellent selectivity. The excellent sensitivity and selectivity clearly indicate the great potential of the CuNW_GSS in diagnosing diabetes easily.
나원주,박진욱,장정식 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
We developed the liquid-ion gated field-effect transistor (FET) sensor, based on reduced graphene oxide (rGO)-polyfuran (PF) nanocomposites. This FET sensor showed the hole transporting behavior that is called p-type sensor. The conductivity of the rGO-PF NT hybrid was higher than that of rGO and PF NTs. The real-time responses of the FET-type Hg<sup>2+</sup> sensor were so rapid that is less than 1 sec. Immediate signal changes were observed in the wide range of Hg<sup>2+</sup> ion concentrations from 10 pM to 100 nM that means the detection limit of Hg<sup>2+</sup> was approximately 10 pM. Moreover, these nanocomposites have also highly selectivity of the rGO-PF hybrids toward Hg<sup>2+</sup>. Remarkable detection of Hg<sup>2+</sup> was monitored in the metal ions mixture that very low concentrations of Hg<sup>2+</sup> ions were mixed with in the analyte.