Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2007-06-26
Physics
Condensed Matter
Soft Condensed Matter
17 page, 4 figures, accepted for publication at PRB. Physical Review B, accepted
Scientific paper
10.1103/PhysRevB.76.113408
We studied the dynamical response of a nanomechanical resonator to biomolecular (e.g. DNA) adsorptions on a resonator's surface by using a theoretical model, which considers the Hamiltonian H such that the potential energy consists of elastic bending energy of a resonator and the potential energy for biomolecular interactions. It was shown that the resonant frequency shift of a resonator due to biomolecular adsorption depends on not only the mass of adsorbed biomolecules but also the biomolecular interactions. Specifically, for dsDNA adsorption on a resonator's surface, the resonant frequency shift is also dependent on the ionic strength of a solvent, implying the role of molecular interactions on the dynamic behavior of a resonator. This indicates that nanomechanical resonators may enable one to quantify the biomolecular mass, implying the enumeration of biomolecules, as well as gain insight into intermolecular interactions between adsorbed biomolecules on the surface.
Eom Kilho
Kim Tae Song
Kwon Tae Yun
Lee Hong Lim
Yoon Dae Sung
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