دورية أكاديمية
Carbon Dots: A Modular Activity to Teach Fluorescence and Nanotechnology at Multiple Levels
| العنوان: | Carbon Dots: A Modular Activity to Teach Fluorescence and Nanotechnology at Multiple Levels |
|---|---|
| اللغة: | English |
| المؤلفون: | Pham, Susan N., Kuether, Joshua E., Gallagher, Miranda J., Hernandez, Rodrigo Tapia, Williams, Denise N. (ORCID |
| المصدر: | Journal of Chemical Education. Aug 2017 94(8):1143-1149. |
| الإتاحة: | 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 |
| Peer Reviewed: | Y |
| Page Count: | 7 |
| تاريخ النشر: | 2017 |
| Sponsoring Agency: | National Science Foundation (NSF) |
| Contract Number: | CHE1503408 |
| نوع الوثيقة: | Journal Articles Reports - Research |
| Education Level: | Secondary Education |
| Descriptors: | Chemistry, Electronic Equipment, Spectroscopy, Science Instruction, Science Activities, Laboratory Equipment, Molecular Structure, Technology, Light, Science Laboratories, Secondary School Science, College Science, Undergraduate Study, Laboratory Experiments |
| DOI: | 10.1021/acs.jchemed.6b00995 |
| تدمد: | 0021-9584 |
| مستخلص: | In recent years, nanomaterials have entered our daily lives via consumer products; thus, it has become increasingly important to implement activities to introduce these novel materials into chemistry curricula. Here we introduce a newly developed fluorescent nanomaterial, carbon dots, as a more environmentally friendly alternative to heavy-metal semiconductor quantum dots to be used as a model nanomaterial for experiments at multiple educational levels ranging from high school to upper-division college laboratories. These dots, which are polymeric in nature, can be made from a variety of carbon precursors and a cross-linker such as ethylenediamine. The synthesis, which involves heating in a conventional microwave, is quick and straightforward and can be carried out in typical high school chemistry laboratories. The resulting solution is fluorescent without further purification. To increase the complexity for entry-level college students, absorption and emission spectra of the carbon dot solution can be collected as an introduction to spectroscopy. In more advanced undergraduate lab courses, the quantum yield can be determined with a standard reference fluorescent material such as quinine sulfate. Atomic force microscopy or transmission electron microscopy images can also be collected to illustrate the morphology of these particles where such specialty instruments are accessible. |
| Abstractor: | As Provided |
| Number of References: | 35 |
| Entry Date: | 2017 |
| رقم الأكسشن: | EJ1151413 |
| قاعدة البيانات: | ERIC |
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