Chemical Analysis Using Scanning Force Microscopy. An Undergraduate Laboratory Experiment

• Mathew M. Maye ^[1] ; Jin Luo ^[1] ; Li Han ^[1] ; Chuan-Jian Zhong ^[1]
  1. [1] SUNY at Binghamton, United States
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 79, Nº 2, 2002, pág. 207
• Idioma: inglés
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• Resumen

  • This undergraduate laboratory experiment uses scanning force microscopy to perform chemical analysis at chemically designed surfaces. It involves lateral force measurements at self-assembled monolayers to provide chemical mapping capability. Monolayer patterns with different functional groups were prepared on gold substrates using a micro-contact printing method. The simplicity of the sample preparation and the relative ease of the microscope operation allowed students to gain hands-on experience in molecular assembling, image acquisition, and data interpretation. The images were analyzed and discussed in terms of tip-sample interaction forces and surface chemical composition of the patterned monolayers. This experiment helps students to grasp analytical concepts based on chemical interactions at atomic and molecular levels.