Influence of charge traps in carbon nanodots on gas interaction

Anwesha Mukherjee, Siva Kumar Reddy, Buddha Deka Boruah, Abha Misra

Research output: Contribution to journalArticlepeer-review


The nonlinear electrical characteristic of carbon nanodots (CNDs) has revealed important physical phenomena of charge trapping playing a dominant role in surface interactions. Functional groups on the surface of CNDs attract ambient water molecules which in turn act as charge traps and give rise to electrical hysteresis that plays a dominant role in understanding charge transport in CNDs on surface interactions. Hysteresis in the current-voltage response is further utilized to study the interaction of the CNDs with nitrogen dioxide gas as an external stimuli. The hysteresis area is observed to be dependent on the time of gas interaction with the CNDs, therefore revealing the interaction mechanism of the CNDs with the gas.

Original languageEnglish
Article number135206
Issue number13
StatePublished - 3 Mar 2017
Externally publishedYes


  • carbon nanodots
  • charge transport
  • charge traps
  • gas interaction
  • hysteresis
  • nitrogen dioxide
  • surface functional groups


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