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Sizing by Weighing: Characterizing Sizes of Ultrasmall-Sized Iron Oxide Nanocrystals Using MALDI-TOF Mass Spectrometry

Cited 38 time in Web of Science Cited 42 time in Scopus
Authors
Kim, Byung Hyo; Shin, Kwangsoo; Kwon, Soon Gu; Jang, Youngjin; Lee, Hyun-Seok; Lee, Hyunjae; Jun, Samuel Woojoo; Lee, Jisoo; Han, Sang Yun; Yim, Yong-Hyeon; Kim, Dae-Hyeong; Hyeon, Taeghwan
Issue Date
2013-02
Citation
Journal of the American Chemical Society, Vol.135 No.7, pp.2407-2410
Abstract
We present a rapid and reliable method for determining the sizes and size distributions of <5 nm-sized iron oxide nanocrystals (NCs) using matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry (MS). MS data were readily converted to size information using a simple equation. The size distribution obtained from the mass spectrum is well-matched with the data from transmission electron microscopy, which requires long and tedious analysis work. The size distribution obtained from the mass spectrum is highly resolved and can detect size differences of only a few angstroms. We used this MS-based technique to investigate the formation of iron oxide NCs, which is not easy to monitor with other methods. From ex situ measurements, we observed the transition from molecular precursors to clusters and then finally to NCs.
ISSN
0002-7863
URI
http://hdl.handle.net/10371/164366
DOI
https://doi.org/10.1021/ja310030c
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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