研究目的
开发一种基于单层红荧烯功能化石墨烯复合材料(G/mRub)和免疫识别诱导的3D DNA机器的超灵敏"开-关"电化学发光生物传感器,用于检测血清样本中的胱抑素C(Cys C)。
研究成果
基于G/mRub和免疫识别诱导的3D DNA机器开发的电化学发光生物传感器对人类血清中的胱抑素C表现出高灵敏度、宽线性范围和低检测限,显示出其在临床诊断和高性能发光纳米材料制备方面的潜力。
研究不足
该研究未明确提及局限性,但潜在的优化方向可能包括G/mRub复合材料及3D DNA机器在不同临床样本中的稳定性和可重复性。
1:实验设计与方法选择:
研究采用一步重沉淀法合成G/mRub-Pt复合材料,并构建无酶三维DNA机器用于信号放大。
2:样本选择与数据来源:
使用人血清样本检测胱抑素C(Cys C)。
3:实验设备与材料清单:
包含氧化石墨烯、红荧烯、氯铂酸、氯化金、抗坏血酸及多种DNA寡核苷酸。
4:实验流程与操作步骤:
包括G/mRub-Pt复合材料的制备、三维DNA机器的组装、电化学发光(ECL)生物传感器的构建及ECL测量过程。
5:数据分析方法:
通过分析ECL强度变化测定Cys C浓度。
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transmission electron microscope
7500
Hitachi
Used for characterizing the morphologies of nanomaterials.
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scanning electron microscopy
S-4800
Hitachi
Used for characterizing the morphologies of nanomaterials.
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atomic force microscopy
Bruker Dimension Icon
Bruker
Used for characterizing the thickness in the stepwise assembly process of G/mRub-Pt composites.
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UV-vis spectrophotometer
UV-2450
Shimadzu
Used for UV-vis absorption spectra characterization.
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fluorescence spectrophotometer
Cary Eclipse
Agilent Technologies
Used for fluorescence spectra characterization.
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graphene oxide
Xianfeng Nano Materials Tech Co. Ltd.
Used as a nanocarrier for the assembly of monolayer rubrene.
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rubrene
Sigma-Aldrich Chemical Co.
Used as the ECL emitter in the biosensor.
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chloroplatinic acid
Sigma-Aldrich Chemical Co.
Used for the in situ reduction of Pt nanoparticles on the surface of G/mRub.
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gold chloride
Sigma-Aldrich Chemical Co.
Used for the preparation of Au nanoparticles.
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ascorbic acid
Sigma-Aldrich Chemical Co.
Used as a reducing agent for the synthesis of G/mRub-Pt composites.
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electrochemistry workstation
CHI660D
Shanghai Chenhua Instruments
Used for electrochemical and ECL measurements.
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MPI-E multifunctional analyzer
MPI-E
Xi'An Remax Electronic Science & Technology Co. Ltd.
Used for ECL measurements.
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X-ray photoelectron spectroscopy
VG Scientific ESCALAB 250
VG Scientific
Used for elemental composition analysis of G/mRub-Pt composites.
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