Raman Lone Pair in Oxides, Nitrides, and Bio-Molecules

2 Raman Lone Pair in Oxides, Nitrides, and Bio-Molecules 

The detected Raman features are quite similar to that of H2O, protein, and DNA [11]. The peak positions depend on the reduced atomic mass, p = niini2/ (mi + m2), of the components, and the force constant, k, of the weak interaction (ft) oc = (Td/p) ). The k equals the second derivative of the interatomic 

The multi-peak of Raman shift corresponds to different orders of the Fourier coefficients in the numerical solutions of the Schrodinger equation of the vibronic systems. In bio-molecules, the characteristic vibration frequency of the hydrogen bond is about 200 cm. It is known that the hydrogen bond is actually composed of a lone pair on one side and a covalent bond on the other in the B+ p A ). The B is less electronegative than A of which the sp orbits 

EELS and Raman provide detailed information about the weak nonbonding interactions evolved from Coulomb to lone pair and to the H-bond likes at oxygen chemisorbed surfaces and presence of the lone parr in oxide and nitride with characteristic frequencies at low frequencies. 

Miyake, N. Satomi, S. Sasaki, Elastic modulus of polystyrene film from near surface to bulk measured by nanoindentation using atomic force microscopy. Appl. Phys. Lett. 89(3), 031925 (2006) 

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