Synthesis of MXene/DNA/Pd/Pt nanocomposite for sensitive detection of dopamine

被引：142

作者：

Zheng, Jiushang ^{[1
]}

Wang, Bin ^{[1
]}

Ding, Ailing ^{[1
]}

Weng, Bo ^{[1
]}

Chen, Jiucun ^{[1
,2
]}

机构：

[1] Southwest Univ, Fac Mat & Energy, Inst Clean Energy & Adv Mat, Chongqing 400715, Peoples R China

[2] Southwest Univ, Chongqing Engn Res Ctr Micronano Biomed Mat & Dev, Chongqing 400715, Peoples R China

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2018年 / 816卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

MXene; DNA template; Pd/Pt nanoparticles; Electrochemical sensors; ELECTROCHEMICAL DETECTION; MXENE; SENSOR; INTERCALATION; NANOCRYSTALS; CARBIDE; TI3ALC2; TI3C2; ACID;

D O I：

10.1016/j.jelechem.2018.03.056

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A novel MXene-based nanocomposite (MXene/DNA/Pd/Pt) is synthesized end applied for the development of sensitive dopamine (DA) sensors. MXene nanosheets act as conductive matrix for Pd/Pt nanoparticles loading, and DNA is adsorbed on MXene surface through aromatic hydrophobic bases to induce the In-situ growth of PdNPs and Pd/Pt nanoparticles. The results reveal that DNA plays vital roles in the formation of the nano composites, which not only favors the dispersion of Ti3C2 nanosheets, but also facilitates the even growth of PdNPs and Pd/Pt nanoparticles. The deposition of Pd/Pt nanoparticles onto Ti3C2 nanosheets efficiently enhances the electrocatalytic activity of the nanocomposites towards DA. The constructed sensor exhibited linear amperometric response in the DA concentration range of 0.2-1000 mu M with a lower detection limit of 30 nM (S/ N = 3) and high selectivity against ascorbic acid (AA), uric acid (UA) and glucose (Girl). The successful determination of DA in human serum samples further verifies the potential application of the constructed sensors.

引用

页码：189 / 194

页数：6

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