Literaturnachweis - Detailanzeige
Autor/inn/en | Millier, Brian; Aleman Milán, Gianna |
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Titel | A Cost-Effective Optical Device for the Characterization of Liquid Crystals |
Quelle | In: Journal of Chemical Education, 91 (2014) 4, (6 Seiten)Infoseite zur Zeitschrift
PDF als Volltext |
Sprache | englisch |
Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
ISSN | 0021-9584 |
DOI | 10.1021/ed400366e |
Schlagwörter | Science Instruction; Chemistry; College Science; Undergraduate Study; Science Laboratories; Laboratory Equipment; Optics |
Abstract | The design and construction of an apparatus to measure the optical birefringence of a liquid crystal is described. The instrument also includes temperature control and monitoring circuitry to allow for the measurement of the nematic-to-isotropic phase transition temperature. An important feature of this design is that the students are able to build the optical bench section of the instrument from a kit of parts supplied. The electronics instrumentation for the illuminator, photometer, and temperature controller functions are all low-cost designs using common components, yet provide more than adequate accuracy for the measurements required. The entire instrument cost is $430, an estimated cost reduction of approximately $3000 compared to the design previously proposed by Waclawik et al. This instrumentation is suitable for second or third-year undergraduate students in materials science or physical chemistry courses. (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 | 2017/4/10 |