Nonlinear optical measurement of membrane potential around single molecules at selected cellular sites
AUTOR(ES)
Peleg, Gadi
FONTE
The National Academy of Sciences
RESUMO
Membrane potential around single molecules has been measured by using the nonlinear optical phenomenon of second harmonic generation. This advance results from the interaction between a highly dipolar molecule with a selectively directed highly polarizable 1-nm gold particle. With this approach, a second harmonic signal, which is enhanced by the nanoparticle, is detected from a volume of nanometric dimensions. This present work clearly shows that functional cellular imaging around single molecules is possible by selectively directing an antibody with a 1-nm gold label to a specific membrane protein. The results of this work open the way for three-dimensional, high resolution functional imaging of membrane electrophysiology in cells and cellular networks.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=21978Documentos Relacionados
- Infrared nonlinear optical measurements of membrane potential in photoreceptor cells.
- A few selected applications of surface nonlinear optical spectroscopy.
- Probing membrane potential with nonlinear optics.
- Mechanics of single kinesin molecules measured by optical trapping nanometry.
- Nonlinear optical properties of some newly developed crystals for measurement of ultrafast laser pulses