Figure 4.

SEM images of the CD4 T cell and QNPA. (a, b, c) SEM images (top and tilt views) of the CT4 T cell on the QNPA substrates before and after FIB ion milling, respectively. (d, e) Cross-sectional SEM images of QNPA without and with surface-bound T cell, respectively. (f) Overlapped images of QNPA from only QNPA and from QNPA covered by the cell. All cells were highlighted in blue, while the Pt was in purple, for clear differentiation.

Kim et al. Nanoscale Research Letters 2013 8:332   doi:10.1186/1556-276X-8-332
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