ERIC Number: EJ1240904
Record Type: Journal
Publication Date: 2020-Jan
Pages: 5
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Synthesis of Fluorescent Silver Nanoclusters: Introducing Bottom-Up and Top-Down Approaches to Nanochemistry in a Single Laboratory Class
Zhu, Lin; Gharib, Mustafa; Becker, Charline; Zeng, Yuan; Ziefuß, Anna R.; Chen, Lizhen; Alkilany, Alaaldin M.; Rehbock, Christoph; Barcikowski, Stephan; Parak, Wolfgang J.; Chakraborty, Indranath
Journal of Chemical Education, v97 n1 p 239-243 Jan 2020
A laboratory class was developed and evaluated to illustrate the synthesis of metal nanoclusters (NCs) and to explain their photoluminescence properties for the case of silver. The described experiment employs a synthetic protocol that consists of two sequential phases in a single reaction pot: the reduction of silver ions into plasmonic silver nanoparticles (NPs) (bottom-up), followed by etching the formed silver NPs into ultrasmall atomically precise fluorescent silver NCs (top-down), Ag[subscript 29] (DHLA)[subscript 12] (DHLA: dihydrolipoic acid). UV-vis absorption and fluorescence spectroscopy were employed as a function of reaction time to confirm the development of the plasmonic character of silver NPs (reaction intermediate) and, later on, the onset of fluorescence emission of the silver NCs (final product). Collectively, this experiment was found to be simple to carry out, safe, reproducible, and cost-effective, and it achieved the intended learning outcomes. Participating students found this laboratory class suitable to be implemented into an upper-division undergraduate or graduate curriculum.
Descriptors: College Science, Chemistry, Science Laboratories, Laboratory Experiments, Lighting, Kinetics, Metallurgy, Spectroscopy
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
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A