Feng-Ming Liu
Imperial College London
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Feng-Ming Liu.
Faraday Discussions | 2006
Mino Green; Feng-Ming Liu; L. F. Cohen; Peter Köllensperger; Tony Cass
Surface Enhanced Raman Scattering (SERS) gives rise to analytical applications with much promise. In our approach three steps are necessary. We require a SERS platform of high enhancement. This has been achieved using the special technique of Island Lithography, combined with Ag deposition by galvanic exchange, yielding an enhancement factor of 10(8). Probe oligonucleotide molecules are attached to a specific area on the platform, at the optimized surface concentration, using thiolated single stranded (ss) DNA molecules. The optimum surface concentration has been determined and interpreted in the light of the polyelectrolyte behaviour of ssDNA. Finally the change in SERS produced by hybridisation of the probe molecules to a target DNA molecule is measured. Highly discernible changes have been obtained. No change in probe signal is seen when presented with one base mismatched target. From this work it is concluded that the prospects for label-free DNA detection in high-density arrays is now close to achievement.
Journal of Chemical Physics | 2005
Robert C. Maher; J. Hou; L. F. Cohen; E. C. Le Ru; J. M. Hadfield; Joanne E. Harvey; P. G. Etchegoin; Feng-Ming Liu; Mino Green; Richard J. C. Brown; Martin J. T. Milton
Anti-Stokes/Stokes asymmetries under surface enhanced Raman scattering (SERS) conditions are studied for a wide variety of SERS-active media and different analytes. Evidence is provided for the existence of underlying resonances that create these asymmetries. We show here that these resonances are associated with the electromagnetic coupling between the analyte (probe) and the metal. The work demonstrates the use of the anti-Stokes/Stokes ratio as a tool to understand the hierarchy of resonances in the SERS problem, which is essential for quantification purposes.
Physical Chemistry Chemical Physics | 2009
Robert C. Maher; Teng Zhang; L. F. Cohen; J. C. Gallop; Feng-Ming Liu; Mino Green
Enhancement factors under SERS conditions are characterised for two SERS active substrates with different geometries using a combination of optical pumping and photobleaching. A rigorous mathematical method of the photobleaching dynamics under SERS conditions is developed to allow the average enhancement factor to be investigated whilst maximal enhancement factors are studied using optical pumping. We show that both average and maximal enhancements are correlated for the surfaces with average enhancements of approximately 10(8).
Archive | 2008
Mino Green; Feng-Ming Liu
Archive | 2007
Mino Green; Feng-Ming Liu
Journal of Materials Chemistry | 2004
Feng-Ming Liu; Mino Green
Archive | 2007
Mino Green; Feng-Ming Liu
Archive | 2009
Mino Green; Feng-Ming Liu
Archive | 2010
Mino Green; Feng-Ming Liu; フェン−ミン・リウ; ミノ・グリーン
Archive | 2007
Mino Green; Feng-Ming Liu
Collaboration
Dive into the Feng-Ming Liu's collaboration.
MacDiarmid Institute for Advanced Materials and Nanotechnology
View shared research outputs