Abstract
Scanning tunneling microscopy (STM) and noncontact atomic-force microscopy (AFM) have been used to investigate the $4\ifmmode\times\else\texttimes\fi{}1$ and $1\ifmmode\times\else\texttimes\fi{}2$ reconstructions of ${\mathrm{SnO}}_{2}(110).$ These terminations were prepared by sequential annealing in UHV at temperatures of 900 and 1075 K, respectively. Two coexisting $4\ifmmode\times\else\texttimes\fi{}1$ structures are observed with STM, one of which is consistent with previously reported STM images, the other appearing to arise from a SnO(101) overlayer. For the $1\ifmmode\times\else\texttimes\fi{}2$ phase, a combination of STM and noncontact AFM images point to an added-row morphology.
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