Abstract
A novel method is reported here to attach ZnO nanoclusters accurately at the end of multi-walled carbon nanotubes (MWCNTs) in a hydrothermal system. The ends of MWCNTs were selectively functionalised using gas-phase functionalisation in ammonia. ZnO/MWCNT heterojunctions are formed accurately at the nanotube-ends through hydrothermal microemulsion synthesis. The reverse micelle of sodium dodecyl sulphate combines with the positive nitrogen-containing basic groups at the MWCNT end and act as the microreactors for ZnO nanoclusters. The sidewalls of the MWCNTs remain intact without any ZnO particles functionalisation. The results represent a versatile approach that is highly scalable and could pave the way toward versatile heterojunction devices fabrication.
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