Biomedical Engineering Reference
In-Depth Information
Figure 10.16
(Left) Tip curvature of a fabricated nanoneedle as a function
of NA of the focusing lens. (Right) SEM image of a chiral nanoneedle with a
tipcurvatureof36nm.ReprintedwithpermissionfromRef.[17].Copyright
2012 American Chemical Society.
Figure 10.17
(Left) Measured current against supplied voltage between
the nanoneedle and the substrate by using a tungsten probe. (Right) EDX
spectra of the nanoneedle and the substrate. Reprinted with permission
from Ref. [17].Copyright 2012 American Chemical Society.
resistance of the needle excluding the internal resistance of the
probe was measured to be nearly 50 m
. The measured EDX
spectrum of the fabricated needle (shown by the red line) was also
identical to that of the substrate surface (shown by the black line),
indicating that the fabricated nanoneedle and the substrate had the
same chemical compositions. And thus, the fabricated needle was
perfectly metallic.
