Conducting carbon quantum dots are reported, and single quantum dots were probed using spreading resistance imaging.

We have recently reported the synthesis of water-dispersible, polymer-passivated and redox-active carbon quantum dots (CQDs).

Novel carbon quantum dots (CQDs) with unexplored potential, are interesting nanomaterials for electronic investigations. Formation of surface defect sites in these Q-dots is a consequence of combinations of various carbon hybridizations. In this work nanocomposites of CQDs with an electronically inert polymer, poly vinyl alcohol (PVA), have been electrically characterized. The electronic properties were observed to be tunable by compositions of component materials. A detail conduction mechanism of charge storage within composites' layer has been worked out. The dielectric properties of composites are observed to be dependent on morphologies developed from segregation of CQDs within composites. The composites possess improved dielectric properties compared to individual component materials. Simulation of the dielectric properties reveals that the nanocomposites actually derive qualities of its' component materials.

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Water dispersible conducting carbon quantum dots (CQDs) have been modified with PPy through a unique surface confined auto‐catalytic process. Viscoelastic and electronic characteristics of the concentrated CQD‐PPy aqueous suspension confirmed semiconducting ink‐like behavior. The ink forms stable impression on paper, glass and fabric. CQD‐PPy ink coated substrates respond selectively towards different flavors (VOCs) originating in packaged food items.

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