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

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Title
Sizing by Weighing: Characterizing Sizes of Ultrasmall-Sized Iron Oxide Nanocrystals Using MALDI-TOF Mass Spectrometry
Author(s)
Byung Hyo Kim; Kwangsoo Shin; Soon Gu Kwon; Youngjin Jang; Lee, Hyun-Seok; Hyunjae Lee; Jisoo Lee; Han, Sang Yun; Yim, Yong-Hyeon; Dae-Hyeong Kim; Samuel Woojoo Jun; Taeg Hwan Hyeon
Publication Date
2013-02
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.135, no.7, pp.2407 - 2410
Publisher
AMER CHEMICAL SOC
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.
URI
https://pr.ibs.re.kr/handle/8788114/1390
DOI
10.1021/ja310030c
ISSN
0002-7863
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
6. Sizing by Weighing Characterizing Sizes of Ultrasmall-Sized Iron Oxide Nanocrystals Using MALDI-TOF Mass Spectrometry.pdfDownload

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