title: Molecular mechanism of monodisperse colloidal tin-doped indium oxide nanocrystals by a hot-injection approach.
abstract: Molecular mechanisms and precursor conversion pathways associated with the reactions that generate colloidal nanocrystals are crucial for the development of rational synthetic protocols. In this study, Fourier transform infrared spectroscopy technique was employed to explore the molecular mechanism associated with the formation of tin-doped indium oxide (ITO) nanocrystals. We found that the reaction pathways of the indium precursor were not consistent with simple ligand replacements proposed in the literature. The resulting understanding inspired us to design a hot-injection approach to separate the ligand replacements of indium acetate and the aminolysis processes, generating quality ITO nanocrystals with decent size distributions. The hot-injection approach was readily applied to the synthesis of ITO nanocrystals with a broad range of tin doping. Structural, chemical, and optical analyses revealed effective doping of Sn4+ ions into the host lattices, leading to characteristic and tunable near-infrared surface plasmon resonance peaks. The size control of ITO nanocrystals by multiple hot-injections of metal precursors was also demonstrated.
authors.affiliation: State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China. yizhengjin@zju.edu.cn.
authors.forename: Yizheng
authors.initials: Y
authors.lastname: Jin
authors.forename: Qing
authors.initials: Q
authors.lastname: Yi
authors.forename: Yuping
authors.initials: Y
authors.lastname: Ren
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
authors.forename: Zhizhen
authors.initials: Z
authors.lastname: Ye
references.citation: Langmuir. 2010 Mar 16;26(6):4246-50
references.pmid: 20141171
references.citation: J Am Chem Soc. 2005 Jul 6;127(26):9506-11
references.pmid: 15984877
references.citation: J Am Chem Soc. 2002 Apr 3;124(13):3343-53
references.pmid: 11916419
references.citation: Nanoscale. 2012 Mar 21;4(6):1982-95
references.pmid: 22159429
references.citation: Angew Chem Int Ed Engl. 2006 May 19;45(21):3414-39
references.pmid: 16642516
references.citation: J Am Chem Soc. 2006 Aug 9;128(31):10310-9
references.pmid: 16881663
references.citation: Small. 2011 Feb 7;7(3):377-87
references.pmid: 21294267
references.citation: J Am Chem Soc. 2009 Oct 28;131(42):15457-66
references.pmid: 19775131
references.citation: J Am Chem Soc. 2009 Dec 16;131(49):17736-7
references.pmid: 19921844
references.citation: Chem Rev. 2010 Jan;110(1):389-458
references.pmid: 19958036
references.citation: Nat Mater. 2005 Feb;4(2):138-42
references.pmid: 15640806
references.citation: Nature. 2000 Mar 2;404(6773):59-61
references.pmid: 10716439
references.citation: J Am Chem Soc. 2010 Sep 29;132(38):13381-94
references.pmid: 20825193
references.citation: Nano Lett. 2011 Oct 12;11(10):4415-20
references.pmid: 21859093
references.citation: J Am Chem Soc. 2012 Aug 15;134(32):13410-4
references.pmid: 22816386
references.citation: J Am Chem Soc. 2011 Nov 2;133(43):17248-56
references.pmid: 21939230
references.citation: J Am Chem Soc. 2010 Dec 29;132(51):18206-13
references.pmid: 21128655
references.citation: J Am Chem Soc. 2011 Apr 6;133(13):5036-41
references.pmid: 21384888
references.citation: J Am Chem Soc. 2005 Sep 28;127(38):13331-7
references.pmid: 16173766
references.citation: J Am Chem Soc. 2007 Sep 5;129(35):10937-47
references.pmid: 17696349