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. 2014 Oct 28;14(11):6685–6692. doi: 10.1021/nl5034304

Figure 1.

Figure 1

NR–CNT films and electrode arrays. (a) Schematic representation of the photoactive electrode preparation. NR conjugation onto a CNT film is based on covalent binding enabled by a ppAA coating of the CNTs. Light is absorbed by the film, followed by charge separation at the NR–CNT interface which elicits a neuronal response. (b) XPS chemical analysis of pristine (continuous line) and ppAA coated CNT film (dashed line) demonstrating the formation of carboxylic groups. (c) SEM image of a ppAA coated CNT film demonstrating preservation of porous structure; the scale bar is 200 nm. (d) Absorption (continuous line) and emission (dashed line) spectrum of the CdSe/CdS NRs; Inset: a TEM image of the CdSe/CdS NRs; the scale bar is 20 nm. (e) SEM image of a NR–CNT film; the scale bar is 100 nm. NRs appear as bright elongated elements on the CNTs. (f) An optical microscope image of a CNT multi electrode array (MEA); the scale bar is 200 μm. (g) CNT electrode array on a PDMS flexible support; the scale bar is 1 mm.