AI Article Synopsis
- A study utilizing transient absorption spectroscopy reveals new insights into how charge transfers occur when light hits carbon nanotube@TiO interfaces.
- The research demonstrates that holes are transferred from TiO to carboxylic acid-functionalized multiwalled carbon nanotubes (oxMWCNTs), resulting in altered electronic properties of both materials.
- Supporting techniques, like ultraviolet photoemission spectroscopy, confirm a strong interaction between oxMWCNTs and TiO, reinforcing the findings from transient absorption data.
Article Abstract
A new insight into photoinduced charge transfer processes across carbon nanotube@TiO interfaces has been gained based on experimental details from transient absorption spectroscopy. We show that photoinduced, interfacial hole transfer to carboxylic acid-functionalized multiwalled carbon nanotubes (oxMWCNTs) from TiO results in hole-doped oxMWCNTs and reduced TiO. The latter is inferred from femto- and nanosecond transient absorption spectroscopy performed with oxMWCNT@TiO dispersions and complemented with investigations using methyl viologen and N,N,N',N'-tetramethyl-p-phenylenediamine as an electron scavenger and a hole scavenger, respectively. The results of ultraviolet photoemission spectroscopy (UPS) of the compounds corroborate the findings, highlighting the strong coupling between oxMWCNTs and TiO in these hybrids.
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| http://dx.doi.org/10.1039/c7nr00759k | DOI Listing |
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