We suggest the multi-functions of nanodiamond (ND) as a neuritogenesis promoter and super-resolution imaging probe. Owing to the photoblinking property of ND, bioimages were visualized in super-resolution using the direct stochastic optical reconstruction microscopy process, which resolved the ambiguity in the distinction of nearby particles. In this study, NDs were endocytosed by HT-22 hippocampal neuronal cells and promoted a spontaneous neuritogenesis without any differentiation factor, which was visualized by NDs as super-resolution imaging probes without toxicity. In conclusion, it is suggested that ND has excellent neuritogenic capability and potential as a super-resolution neural imaging probe with its outstanding biocompatibility.
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