TEM micrographs of the modified AFM probe. (a) TEM micrograph of the new AFM probe. (b) Following application of a 2-V pulse to the Au-NP for 32 ns, most of the probes presented no visible Au-NP. After conjugating these probes with a QD, (c) 44% of tips were able to pick up single QDs (red arrow) and (d) 56% of tips were unable to pick up anything.
Cheng et al. Nanoscale Research Letters 2013 8:482 doi:10.1186/1556-276X-8-482