Jianyun Liu
Max Planck Society
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Publication
Featured researches published by Jianyun Liu.
Chemical Communications | 2003
Shengjun Tian; Jianyun Liu; Tao Zhu; Wolfgang Knoll
Doping polyaniline with COO(-)-modified gold nanoparticles by forming stable layer-by-layer multilayer films can shift its electroactivity to neutral pH. The films can electrocatalyze the oxidation of NADH and offer potential applications in other fields, e.g., optoelectronics or biosensing.
Archive | 2012
Wolfgang Knoll; Jianyun Liu; Lifang Niu; Peter E. Nielsen; Louis Tiefenauer
This contribution introduces strategies for the sensitive detection of oligonucleotides as bio-analytes binding from solution to a variety of probe architectures assembled at the (Au-) sensor surface. Detection principles based on surface plasmon optics and electrochemical techniques are compared. In particular, cyclic- and square wave voltammetry (SWV) are applied for the read-out of ferrocene redox labels conjugated to streptavidin that binds to the (biotinylated) DNA targets after hybridizing to the interfacial probe matrix of either DNA or peptide nucleic acid (PNA) strands. By employing streptavidin modified with fluorophores the identical sensor architecture can be used for the recording of hybridization reactions by surface plasmon fluorescence spectroscopy (SPFS). The Langmuir isotherms determined by both techniques, i.e., by SWV and SPFS, give virtually identical affinity constants KA, confirming that the mode of detection has no influence on the hybridization reaction. By using semiconducting nanoparticles as luminescence labels that can be tuned in their bandgap energies over a wide range of emission wavelengths surface plasmon fluorescence microscopy allows for the parallel read-out of multiple analyte binding events simultaneously.
Chemistry of Materials | 2004
Shengjun Tian; Jianyun Liu; Tao Zhu; Wolfgang Knoll
Langmuir | 2005
Jianyun Liu; Shengjun Tian; Wolfgang Knoll
Analytical Chemistry | 2005
M. L. M. Vareiro; Jianyun Liu; Wolfgang Knoll; K. Zak; D. Williams; A. T. A. Jenkins
Analytical Chemistry | 2005
Jianyun Liu; Shengjun Tian; Louis Tiefenauer; Peter E. Nielsen; Wolfgang Knoll
Advanced Functional Materials | 2003
Shengjun Tian; Akira Baba; Jianyun Liu; Zhehui Wang; Wolfgang Knoll; Mi Kyoung Park; Rigoberto C. Advincula
Chemical Communications | 2003
Shengjun Tian; Jianyun Liu; Tao Zhu; Wolfgang Knoll
Chemical Communications | 2005
Jianyun Liu; Shengjun Tian; Peter E. Nielsen; Wolfgang Knoll
Analytical Chemistry | 2006
Jianyun Liu; Louis Tiefenauer; Shengjun Tian; Peter E. Nielsen; Wolfgang Knoll