SCANNING TUNNELLING MICROSCOPIES
\skˈanɪŋ tˈʌnəlɪŋ mˈa͡ɪkɹəskəpɪz], \skˈanɪŋ tˈʌnəlɪŋ mˈaɪkɹəskəpɪz], \s_k_ˈa_n_ɪ_ŋ t_ˈʌ_n_ə_l_ɪ_ŋ m_ˈaɪ_k_ɹ_ə_s_k_ə_p_ɪ_z]\
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A type of scanning probe microscopy in which a very sharp conducting needle is swept just a few angstroms above the surface of a sample. The tiny tunneling current that flows between the sample and the needle tip is measured, and from this are produced three-dimensional topographs. Due to the poor electron conductivity of most biological samples, thin metal coatings are deposited on the sample.
By DataStellar Co., Ltd
Word of the day
Snake's-head
- Guinea-hen flower; -- so called in England because its spotted petals resemble the scales of a snake's head.