A Macroscale Model for Hands-On Activities Demonstrating Transmission Electron Microscopy

Autor/inn/en	Hudson-Smith, Natalie V.; Cahill, Meghan S.; Klein, Nathan D.; Krause, Miriam O.P.; Haynes, Christy L.
Titel	A Macroscale Model for Hands-On Activities Demonstrating Transmission Electron Microscopy
Quelle	In: Journal of Chemical Education, 96 (2019) 7, S.1377-1382 (6 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Hudson-Smith, Natalie V.) ORCID (Cahill, Meghan S.) ORCID (Haynes, Christy L.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
Schlagwörter	Hands on Science; Chemistry; Technology; Molecular Structure; Spectroscopy; Undergraduate Students; College Science; High School Students; Secondary School Science; Manipulative Materials; STEM Education; Demonstrations (Educational); Science Instruction + Suchen Sie Ihr Suchwort? Chemie; Technologie; Spektroskopie; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin; Hilfsmittel; STEM; Demonstrationsexperiment; Demonstrationsmodell; Demonstrationsunterricht; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht
Abstract	Although nanotechnology lessons are increasingly integrated into curricula, students still face significant challenges in understanding the characterization techniques used to investigate nanotechnology. Many characterization techniques, such as transmission electron microscopy (TEM), are prohibitively expensive for primarily undergraduate institutions and completely inaccessible for high schools and local outreach programs. When TEMs are accessible, opportunities for handson use are still limited due to logistics and costs for instrument time. In this project, we present a low cost ($50 USD) macroscale TEM model that uses cyanotype paper for "imaging" and is constructed of materials available at local hardware and pet supply stores and chemistry stockrooms. This model allows students to investigate properties of TEM micrographs including thickness contrast, diffraction contrast, plan view, and tilt series imaging through a series of four hands-on activities in an active-learning setting. The four activities are identification of mystery objects from student cyanotype "micrographs", sizing objects from their micrographs using a scale bar, sketching the structure of a mystery 3D object from acquired tilt series images, and developing unique micrographs with objects of the students' choice and predicting features of the resulting images. The TEM model and associated activities were tested with groups of STEM (Science, Technology, Engineering and Mathematics)-interested high schoolers and were found to enhance student engagement, enjoyment, and understanding of certain properties of TEM micrographs. (As Provided).
Anmerkungen	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: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01