Nanoscale depth resolution in scanning near-field infrared microscopy.
We have recorded nanoscale topography and infrared chemical fingerprints of attomole layered lipids consisting of dimyristoylpho-sphatidylcholine on silicon and mica. Lipids deposited on mica built stacks consisting of up to 25 bilayers, each approximately 5 nm thick, spanning a range from 5-125 nm in height. Contrast evaluation as a function of layer thickness provides the near-field depth resolution.
Physical Chemistry II, NC7/72, Ruhr-Universität Bochum, Germany.
Götz
G
Wollny
Erik
E
Bründermann
Zoran
Z
Arsov
Luca
L
Quaroni
Martina
M
Havenith
D000538:Aluminum Silicates / Q000737:chemistry; D002462:Cell Membrane / Q000378:metabolism; D004134:Dimyristoylphosphatidylcholine / Q000737:chemistry; D004867:Equipment Design; D008051:Lipid Bilayers / Q000737:chemistry*; D008853:Microscopy / Q000379:methods*; D018625:Microscopy, Atomic Force / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D012825:Silicon / Q000737:chemistry; D019265:Spectroscopy, Near-Infrared / Q000379:methods*
D000538:Aluminum Silicates; D008051:Lipid Bilayers; D004134:Dimyristoylphosphatidylcholine; C011934:mica; D012825:Silicon