TY  - JOUR
AB  - Muscovite mica is an important mineral that has become a standard substrate, due to its easy cleavage along the {001} planes, revealing a very flat surface that is compatible with many biological materials. Here we study mica surfaces by dynamic atomic force microscopy (AFM) operated in the non-contact mode (NC-AFM) under ultra-high vacuum (UHV) conditions. Surfaces produced by cleaving in UHV cannot be imaged with NC-AFM due to large surface charges; however, cleavage in air yields much less surface charge and allows for NC-AFM imaging. We present highly resolved NC-AFM images of air-cleaved mica surfaces revealing a rough morphology originating from a high density of nanometre-sized particles. Among these particles, we find regularly shaped structures indicating the growth of crystallites on the surface. The contamination layer cannot be removed by degassing in UHV; even prolonged heating at a temperature of 560 K under UHV conditions does not yield an atomically flat surface.
DA  - 2008
DO  - 10.1088/0957-4484/19/30/305705
LA  - eng
IS  - 30
M2  - 305705
PY  - 2008
SN  - 0957-4484
SP  - 305705-
T2  - Nanotechnology
TI  - How flat is an air-cleaved mica surface?
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29138502
Y2  - 2024-11-22T08:52:07
ER  -