ERIC Number: EJ1170361
Record Type: Journal
Publication Date: 2018-Feb
Abstractor: As Provided
Preparation of Octadecyltrichlorosilane Nanopatterns Using Particle Lithography: An Atomic Force Microscopy Laboratory
Highland, Zachary L.; Saner, ChaMarra K.; Garno, Jayne C.
Journal of Chemical Education, v95 n2 p320-325 Feb 2018
Experiments are described that involve undergraduates learning concepts of nanoscience and chemistry. Students prepare nanopatterns of organosilane films using protocols of particle lithography. A few basic techniques are needed to prepare samples, such as centrifuging, mixing, heating, and drying. Students obtain hands-on skills with nanoscale imaging using an atomic force microscope (AFM) when they learn to characterize samples. Designed surfaces are made using a surface mask of latex or silica spheres to generate nanopatterns of organosilanes. An organic thin film is applied to the substrate using steps of either heated vapor deposition or immersion in solution. The steps for preparing samples are not complicated; however, the nanostructures that are produced by particle lithography are exquisitely regular in geometry and surface arrangement. At the molecular level, two types of sample morphology can be made depending on the step for depositing organosilanes. Ring-shaped nanostructures are produced with heated vapor deposition through a particle mask, and nanoholes are produced within a matrix film using immersion of masked substrates. Experience with advanced AFM instrumentation is obtained for data acquisition, digital image processing, and analysis. Skills with chemical analysis are gained with bench methods of sample preparation. Concepts such as the organization of molecules on surfaces and molecular self-assembly are demonstrated with the visualization of nanopatterns prepared by students. Experiments with particle lithography can be used as a laboratory module or for undergraduate research projects, and are suitable for students with a multidisciplinary science background.
Descriptors: Chemistry, Science Instruction, College Science, Undergraduate Study, Scientific Concepts, Concept Formation, Science Experiments, Laboratory Experiments, Science Laboratories, Hands on Science, Laboratory Equipment, Molecular Structure
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: email@example.com; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Authoring Institution: N/A
Identifiers - Location: Louisiana (Baton Rouge)
Grant or Contract Numbers: N/A