Numerical simulations of variable range hopping conductivity in deoxyguanosine deoxyribose nucleic acid nucleoside films

Abstract

Numerical simulations are performed for conductivity due to the variable range hopping conduction in deoxyribose nucleic acid nucleotides (deoxyguanosine). Self-assembled deoxyguanosine (SAD) crystals are composed of H-bonded planar ribbons, which tend to stack and form solid-state fibers. These ribbons are connected to each other by a π–π bond and form crystalline and amorphous films. We consider that the carriers are localized in H bond and π–π bond sites and the hopping conduction is the result of many series of hops in these sites. The electric field and temperature dependent conductivity expressions are used to explain the conductivity experiments of SAD films. Good agreement between theory and experiment is found.