SCANNING TUNNELLING MICROSCOPY
\skˈanɪŋ tˈʌnəlɪŋ mˈa͡ɪkɹəskəpɪ], \skˈanɪŋ tˈʌnəlɪŋ mˈaɪkɹəskəpɪ], \s_k_ˈa_n_ɪ_ŋ t_ˈʌ_n_ə_l_ɪ_ŋ m_ˈaɪ_k_ɹ_ə_s_k_ə_p_ɪ]\
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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
Platidiam
- An inorganic water-soluble platinum complex. After undergoing hydrolysis, it reacts DNA produce both intra interstrand crosslinks. These crosslinks appear to impair replication and transcription of DNA. The cytotoxicity cisplatin correlates with cellular arrest in G2 phase cell cycle.