Reduction of incubation time and enhancement of analyte adhesion uniformity of impedance biosensors

来源 :第八届全国微全分析系统学术会议、第三届全国微纳尺度生物分离分析学术会议暨第五届国际微化学与微系统学术会议 | 被引量 : 0次 | 上传用户:sorryhappy777
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  Electrochemical impedance spectroscopy (EIS) analysis can detect an analyte with high sensitivity in short time.The self-assembled monolayer (SAM) technique is usually used for attaching analytes to a transducer.In general,the relatively time-consuming incubation time and the non-uniform immobilization of an analyte on the sensing electrode are the commonly encountered problems.This study proposes a simple microvibration method based on Bernoullis theory for improving incubation time and enhancing the adhesion uniformity of the analyte.The detection of the group-2 allergen Der p2 demonstrates that a suitable applied frequency at a fixed amplitude can considerably reduce the sample preparation time and improve the adhesion and adhesive uniformity of the analyte.It is also found that compared to the conventional dipping method the microvibration method can give a relatively large detection range,provide a relatively better detection linearity,and result in a standard detection curve with a relatively large slope so that the sensitivity of the sensor can be increased and the detection error due to measurement variations can be reduced.The proposed scheme can be further applied to other detection methods that use surface-bound reactions for analyte immobilization.
其他文献
A small sphere in a shear flow experiences a lift force perpendicular to the flow direction due to the velocity gradient.The lift force is of great importance on various areas, including aerosol scien
会议
Induced pluripotent stem cell (iPSC) technology holds significant promise for regenerative medicine [1] and diagnostic [2] applications.As a testament to their versatility, iPSCs have been differentia
会议
Co-encapsulating microbead-supported gene libraries and single immune cells in microfluidic droplet followed by RT-PCR and next-generation sequencing is an emerging strategy to extract functional gene
会议
Genetic alternations can serve as highly specific biomarkers to distinguish fatal bacteria or cancer cells from their normal counterparts.However,these mutations normally exist in very rare amount in
Laser-induce fluorescence (LIF) is a sensitive and widely used detection method for capillary electrophoresis (CE).Laser diode is an ideal light source for miniaturized LIF detector due to its small s
Carbon based nanomaterials such as carbon nanotube (CNT) and carbon nanofiber (CNF) [1] have been studied for application to fuel cells,capacitors and various biosensors.We have greatly improved the d
Objectives: Squamous cell carcinoma (SCC) and salivary gland adenoid cystic carcinoma (ACC) are two common malignancies in the oral and maxilla-facial region[1,2].It has been proved that angiogenesis
We reported the development of two- and three-input logic devices based on the fact that Hg2+-,Ag+-,and/or coralyne can drive fluorescence quenching of oligonucleotide-based probe.The designed probe i
Chronic myeloid leukemia (CML) is caused by BCR/ABL,resulting from reciprocal translocation between chromosomes 9 and 22,t (9;22)(q34;q11).1 BCR/ABL is a specific marker of the disease sharing a high
Chitosan is an abundant,biocompatible and biodegradable biomaterial,and its degradation products are harmless natural metabolites,and non-antigenic.Chitosan is an amino-polysaccharide that under moder