Dielectrophoresis-assisted 65-GHz LC-oscillator array CMOS chips for label-free and sensitive detection of microorganism cells
Dielectrophoresis-assisted 65-GHz LC-oscillator array CMOS chips for label-free and sensitive detection of microorganism cells
复制标题
介电泳辅助 65 GHz LC 振荡器阵列 CMOS 芯片,用于微生物细胞的无标记灵敏检测
DOI:
10.1016/j.sna.2023.114286
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Ogawa Yuichi
中科院分区:
文献类型:
--
作者:
Chen Siyao;Yamashige Yoshihisa;Mitsunaka Takeshi;Kondo Naoshi;Shiraga Keiichiro;Ogawa Yuichi
In this paper, we propose a miniature, sensitive, and label-free method for detectingEscherichia coli(E. coli) andSaccharomycescerevisiae(yeast) by using a complementary metal–oxide–semiconductor (CMOS) chip with dielectrophoresis (DEP)-assisted LC-oscillator arrays. Each of the 62 × 24 arrayed sensor elements on the CMOS chip comprises a 65-GHz LC oscillator that senses the dielectric change due to the presence of the microorganisms. Given the non-uniform sensitivity of the LC oscillator, the DEP electrodes fabricated to be placed at the most sensitive position of the LC-oscillator were used to collect microorganisms and thereby enhance the measurement sensitivity. The AC electric field of DEP above 2 MHz interferes with the 65-GHz LC oscillator circuit in the designated vicinity. With appropriate DEP settings, each sensor element can achieve a limit of detection of twoE. colicells or one yeast cell. Quantitative enumeration reaches a single-cell resolution at small microorganism numbers. The results of this study confirmed that the novel approach of combining DEP technique and LC-oscillator array can perform high-sensitivity detection of microorganisms. Further, the realization of large-scale paralleled measurement makes the proposed CMOS biosensor a potential candidate as a rapid and low-cost lab-on-a-chip sensor for food inspection and clinical diagnosis.
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影响因子:
5.4
作者:
Mitsunaka, Takeshi;Sato, Daiki;Fujishima, Minoru
通讯作者:
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影响因子:
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DOI:
10.33945/sami/ajca.2020.2.3
发表时间:
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期刊:
--
影响因子:
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