Negative differential resistance in ZnO coated peptide nanotube

Abstract

We investigate the room temperature electronic transport properties of a zinc oxide (ZnO) coated peptide nanotube contacted with Au electrodes. Current–voltage (I–V ) characteristics show asymmetric negative differential resistance (NDR) behavior along with current rectification. The NDR phenomenon is observed in both negative and positive voltage sweep scans, and found to be dependent on the scan rate and humidity. Our results suggest that the NDR is due to protonic conduction arising from water molecule redox reaction on the surface of ZnO coated peptide nanotubes rather than the conventional resonant tunneling mechanism.

Observation of negative differential resistance in mesoscopic graphene oxide devices

“…In the previous studies, the ambient conditions have found to influence the charge transport mechanisms through electrochemical reactions in the ambient environment and similar NDR peaks have been observed in I-V characteristics of ZnO coated peptide nanotubes and DNA thin films where it is activated by the dissociation of water molecules. (when the applied electric field reaches its electrochemical redox potential) 44 , 45 . In these studies, the NDR peak in electrical conductivity is attributed to protonic (H + ions) conduction which is based on electrolysis of adsorbed water (Grotthuss mechanism) at the electrodes.…”

“…4(a) . This rapid increase in the channel current is swiftly limited by the depletion and slow diffusion of the thin adsorbed layer of water on the GO channel, thus resulting in the NDR peak 44 , 49 . Unlike in the previous studies, where repeated observation of NDR was missing due to the limited rate of water diffusion, GO device do not show such relaxation and NDR can be observed in subsequent sweeps as well.…”

Coexistence of resistance switching and negative differential resistance in the α-Fe2O3 nanorod film

“…Some theories associated with defects (e.g. grain boundary, dislocation, and vacancy) have been proposed; these theories include the resonant tunneling conduction of charges, 13 the current in oxygen vacancy migration, etc. 7 These results show that the emergence of NDR in TMOs and its mechanism of action are closely related to the microscopic structures of TMOs themselves.…”

Отрицательная Дифференциальная Проводимость Структур На Основе Оксида Лантана

“…В случае окислительно-восстановительного механизма ОДП происходит за счет окисления и восстановления активных молекул при определенном напряжении [17]. Происхождение ОДП в структурах Al/OH−La 2 O 3 /p-Si можно объяснить протонной проводимостью, возникающей в результате диссоциации воды (H 2 O ↔ H + + OH − ) на поверхности пленки.…”