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Electrochemical biosensor based on graphene oxide–Au nanoclusters composites for l-cysteine analysis

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Electrochemical biosensor based on graphene oxide–Au nanoclusters composites for l-cysteine analysis
นักวิจัย : Ge, Shenguang , Yan, Mei , Lu, Juanjuan , Zhang, Meng , Yu, Feng , Yu, Jinghua , Song, Xianrang , Yu, Shilin
คำค้น : -
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2554
อ้างอิง : Ge, S., Yan, M., Lu, J., Zhang, M., Yu, F., Yu, Jinghua, et al. (2011). Electrochemical biosensor based on graphene oxide–Au nanoclusters composites for l-cysteine analysis. Biosensors and Bioelectronics, 31, 49-54. , 0956-5663 , http://hdl.handle.net/10220/11043 , http://dx.doi.org/10.1016/j.bios.2011.09.038
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Biosensors and bioelectronics
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

In this paper, a linker-free connected graphene oxide/Au nanocluster (GO–Au NCs) composite was prepared under sonication through electrostatic interactions, and characterized by transmission electron microscope (TEM), atomic force microscope (AFM), ultraviolet–visible (UV–vis) and FT-IR spectrum. The morphological and structural characterizations evidence that the Au NCs can be efficiently decorated on the GO. The electrochemical investigations indicated that GO–Au NCs composite has an important role in the electrocatalytic activity towards the oxidation of l-cysteine (CySH). The GO–Au NCs composite modified electrode shows a large determination range from 0.05 to 20.0 μmol/L, a remarkably low detection limit is 0.02 μmol/L and low oxidation potential (+0.387). It was found that metal ions, carbohydrates, nucleotide acids and amino acids had no distinct effect on the determination of l-cysteine. In addition, the sensor has some important advantages such as simple preparation, fast response, good stability and high reproducibility. The direct determination of free reduced and total CySH in human urine samples has been successfully carried out without the assistance of any separation techniques.

บรรณานุกรม :
Ge, Shenguang , Yan, Mei , Lu, Juanjuan , Zhang, Meng , Yu, Feng , Yu, Jinghua , Song, Xianrang , Yu, Shilin . (2554). Electrochemical biosensor based on graphene oxide–Au nanoclusters composites for l-cysteine analysis.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ge, Shenguang , Yan, Mei , Lu, Juanjuan , Zhang, Meng , Yu, Feng , Yu, Jinghua , Song, Xianrang , Yu, Shilin . 2554. "Electrochemical biosensor based on graphene oxide–Au nanoclusters composites for l-cysteine analysis".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Ge, Shenguang , Yan, Mei , Lu, Juanjuan , Zhang, Meng , Yu, Feng , Yu, Jinghua , Song, Xianrang , Yu, Shilin . "Electrochemical biosensor based on graphene oxide–Au nanoclusters composites for l-cysteine analysis."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2554. Print.
Ge, Shenguang , Yan, Mei , Lu, Juanjuan , Zhang, Meng , Yu, Feng , Yu, Jinghua , Song, Xianrang , Yu, Shilin . Electrochemical biosensor based on graphene oxide–Au nanoclusters composites for l-cysteine analysis. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2554.