Our collaborators
INTERFACIAL
MATERIALS
CHEMISTRY
Advanced spetcroscopy/microscopy with tunable X-ray photon-energy @ Swiss Light Source, DESY, Max-Lab and BESSY-II
Hard X-ray Photo-Emission Spectroscopy (HAXPES)
Appl. Phys. Lett. 105, 102910, 2014
India-Germany Collaborative Project funded by DST (Proposal ID: I-20110707)
........hard X-ray photoelectron spectroscopy analysis of the bismuth ferrite nanoparticles using variable photon energies unexpectedly showed the presence of Bi(0) valence state below the surface region, indicating that bismuth ferrite nanoparticles are chemically inhomogeneous in the radial direction........
X-ray Magnetic Circular Dichroism Spectroscopy (XMCD)
Phys. Rev. B (Rapid Comm.) 90, 220404, 2014
........the discovery of an antiferromagnetic coupling of the magnetic moment of chromium(II) tetraphenylporphyrin (CrTPP) molecules to the magnetization of the clean ferromagnetic Co(001) substrate. We assign this unusual molecule-substrate exchange coupling to the less than half-filled chromium 3d orbitals interacting with Co valence band electrons via porphyrin-ligand molecular orbitals. X-ray magnetic circular dichroism........
X-ray Photo-Emission Eelectron Microscopy (X-PEEM)
Chem. Comm. 50, 5190, 2014
........relevant for spintronics. Unprecedented insight is provided by X-ray photo-emission electron microscopy combined with X-ray magnetic circular dichroism spectroscopy. Here the coupling of a Mn-porphyrin ad-layer to the ferromagnetic Co substrate through suitably modified interfaces is analyzed........
Resonant Auger Electron Spectroscopy (RAES)
J. Phys. Chem. C 114, 12719, 2010
........self-assembled monolayers (SAMs) on Au(111) was characterized by several complementary spectroscopic techniques, including resonant Auger electron spectroscopy (RAES). ........ No perceptible signal related to tail group-to-substrate transfer of the resonantly excited electron was recorded in the RAES spectra of the target films, even though such a transfer is energetically allowed in some of the cases. This was tentatively explained by........
Near-Edge X-ray Absorption Fine-Structure (NEXAFS)
J. Am. Chem. Soc. 129, 15416, 2007
........we present first direct measurements of both tilt and twist angles for several typical aromatic SAMs, NC-(C6H4)2-(CH2)n-SH (n=0-2) and NC-(C6H4)3-CH2-SH on Au(111), abbreviated as BPnCN and TP1CN, respectively. For this purpose, we applied NEXAFS spectroscopy. The presence of the nitrile tailgroup in the target molecules is a crucial point since this group possesses two mutually perpendicular........