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. Author manuscript; available in PMC: 2014 Apr 4.
Published in final edited form as: Methods. 2013 Apr 4;60(2):131–141. doi: 10.1016/j.ymeth.2013.03.029

Fig. 4.

Fig. 4

Effect of gold removal on sensitivity and precision. (A) Sensitivity of gold-coated (gold) and uncoated (blue) cantilevers. (B) Time records of zero-force position (z0) for gold-coated (k = 6.8 pN/nm) and uncoated (k = 7.1 pN/nm) cantilevers. High-bandwidth data (2.5 kHz) are shown in dark colors and smoothed data (10 Hz) in light colors. Note that, while the gold-coated cantilever has an approximately linear drift, there can be significant short-term fluctuations. (C) Averaged power spectral density of five consecutive 100-s records such as those shown in (B). (D) Integrated force noise from the records shown in (C). Data taken on the commercial AFM. This figure is reprinted from [5] with permission from the American Chemical Society.