In Situ Chemical Oxidation of Ultrasmall MoOx Nanoparticles in Suspensions
Joint Authors
Hsu, Julia W. P.
Luo, Kaiyuan
Lee, Yun-Ju
Barrera, Diego
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-05
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Engineering Sciences and Information Technology
Chemistry
Abstract EN
Nanoparticle suspensions represent a promising route toward low cost, large area solution deposition of functional thin films for applications in energy conversion, flexible electronics, and sensors.
However, parameters such size, stoichiometry, and electronic properties must be controlled to achieve best results for the target application.
In this report, we demonstrate that such control can be achieved via in situ chemical oxidation of MoOx nanoparticles in suspensions.
Starting from a microwave-synthesized suspension of ultrasmall (d~2 nm) MoOx nanoparticles in n-butanol, we added H2O2 at room temperature to chemically oxidize the nanoparticles.
We systematically varied H2O2 concentration and reaction time and found that they significantly affected oxidation state and work function of MoOx nanoparticle films.
In particular, we achieved a continuous tuning of MoOx work function from 4.4 to 5.0 eV, corresponding to oxidation of as-synthesized MoOx nanoparticle (20% Mo6+) to essentially pure MoO3.
This was achieved without significantly modifying nanoparticle size or stability.
Such precise control of MoOx stoichiometry and work function is critical for the optimization of MoOx nanoparticles for applications in organic optoelectronics.
Moreover, the simplicity of the chemical oxidation procedure should be applicable for the development of other transition oxide nanomaterials with tunable composition and properties.
American Psychological Association (APA)
Lee, Yun-Ju& Barrera, Diego& Luo, Kaiyuan& Hsu, Julia W. P.. 2012. In Situ Chemical Oxidation of Ultrasmall MoOx Nanoparticles in Suspensions. Journal of Nanotechnology،Vol. 2012, no. 2012, pp.1-5.
https://search.emarefa.net/detail/BIM-453627
Modern Language Association (MLA)
Lee, Yun-Ju…[et al.]. In Situ Chemical Oxidation of Ultrasmall MoOx Nanoparticles in Suspensions. Journal of Nanotechnology No. 2012 (2012), pp.1-5.
https://search.emarefa.net/detail/BIM-453627
American Medical Association (AMA)
Lee, Yun-Ju& Barrera, Diego& Luo, Kaiyuan& Hsu, Julia W. P.. In Situ Chemical Oxidation of Ultrasmall MoOx Nanoparticles in Suspensions. Journal of Nanotechnology. 2012. Vol. 2012, no. 2012, pp.1-5.
https://search.emarefa.net/detail/BIM-453627
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-453627