Lasing and magnetic microbeads loaded with colloidal quantum dots and iron oxide nanocrystals

被引：5

作者：

Li, Minxu ^{[1
,2
]}

You, Guanjun ^{[2
,4
]}

Wang, Andrew Y. ^{[3
]}

Hu, Wenjia ^{[1
]}

Wang, Jingkang ^{[1
]}

Sun, Fengqing ^{[2
]}

Zhu, Yiming ^{[4
]}

Henderson, Ron ^{[5
]}

Xu, Jian ^{[2
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

[2] Penn State Univ, Dept Engn Sci & Mech, State Coll, PA 16802 USA

[3] Ocean NanoTech LLC, Fayetteville, AR 72701 USA

[4] Shanghai Univ Sci & Technol, Engn Res Ctr Opt Instrument & Syst, Minist Educ, Shanghai 200093, Peoples R China

[5] Middle Tennessee State Univ, Murfreesboro, TN 37132 USA

来源：

NANOSCALE | 2013年 / 5卷 / 20期

基金：

美国国家科学基金会;

关键词：

MESOPOROUS SILICA; OPTICAL GAIN; CORE/SHELL NANOCRYSTALS; HIGH-PERFORMANCE; BEADS; ADSORPTION; RESONANCE; EMISSION; SHELL; CORE;

D O I：

10.1039/c3nr02896h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This study investigates the feasibility of loading nanostructured lasing medium and magnetic nanocrystals in the same microbead for potential applications in bio- and chemical sensing. A sequential infiltration process is proposed and tested for the preparation of magnetic and lasing microbeads by incorporating, respectively, iron oxide nanocrystals in the inner cores and colloidal quantum dots (CQDs) in the periphery regions of mesoporous silica microbeads. The co-doped bead structure was confirmed by electron microscopy and energy dispersive spectroscopy. The lasing action of the CQD gain medium in the mesoporous beads was characterized with micro-photoluminescence, revealing sharp whispering gallery mode lasing signatures, whereas the distinguishing superparamagnetic property was measured from the co-doped microbeads with vibrating sample magnetometry.

引用

页码：9598 / 9603

页数：6

共 49 条

[21] Well-dispersed magnetic iron oxide nanocrystals on sepiolite nanofibers for arsenic removal [J].

Tian, Na ;

Tian, Xike ;

Ma, Longlong ;

Yang, Chao ;

Wang, Yanxin ;

Wang, Zhenyang ;

Zhang, Lide .

RSC ADVANCES, 2015, 5 (32) :25236-25243

[22] Synthesis of colloidal silver iron oxide nanoparticles-study of their optical and magnetic behavior [J].

Kumar, Anil ;

Singhal, Aditi .

NANOTECHNOLOGY, 2009, 20 (29)

[23] Biotechnological applications of nanostructured hybrids of polyamine carbon quantum dots and iron oxide nanoparticles [J].

Venerando, A. ;

Magro, M. ;

Baratella, D. ;

Ugolotti, J. ;

Zanin, S. ;

Malina, O. ;

Zboril, R. ;

Lin, H. ;

Vianello, F. .

AMINO ACIDS, 2020, 52 (02) :301-311

[24] Fluorescence-enhanced gadolinium-doped zinc oxide quantum dots for magnetic resonance and fluorescence imaging [J].

Liu, Yanlan ;

Ai, Kelong ;

Yuan, Qinghai ;

Lu, Lehui .

BIOMATERIALS, 2011, 32 (04) :1185-1192

[25] Quantum chemical modeling of iron oxide magnetic nanoparticles functionalized with cytarabine [J].

Shabani, Zeynab ;

Morsali, Ali ;

Bozorgmehr, Mohammad Reza ;

Beyramabadi, S. Ali .

CHEMICAL PHYSICS LETTERS, 2019, 719 :12-21

[26] Conjugated assembly of colloidal zinc oxide quantum dots and multiwalled carbon nanotubes for an excellent photosensitive ultraviolet photodetector [J].

Boruah, Buddha Deka ;

Misra, Abha .

NANOTECHNOLOGY, 2016, 27 (35)

[27] Solution NMR techniques for investigating colloidal nanocrystal ligands: A case study on trioctylphosphine oxide at InP quantum dots [J].

Moreels, Iwan ;

Martins, Jose C. ;

Hens, Zeger .

SENSORS AND ACTUATORS B-CHEMICAL, 2007, 126 (01) :283-288

[28] Colloidal synthesis of tungsten oxide quantum dots for sensitive and selective H2S gas detection [J].

Yu, Haoxiong ;

Song, Zhilong ;

Liu, Qian ;

Ji, Xiao ;

Liu, Jianqiao ;

Xu, Songman ;

Kan, Hao ;

Zhang, Baohui ;

Liu, Jingyao ;

Jiang, Jianjun ;

Miao, Ling ;

Liu, Huan .

SENSORS AND ACTUATORS B-CHEMICAL, 2017, 248 :1029-1036

[29] Colloidal Stability of Magnetic Iron Oxide Nanoparticles: Influence of Natural Organic Matter and Synthetic Polyelectrolytes [J].

Ghosh, Saikat ;

Jiang, Wei ;

McClements, D. Julian ;

Xing, Baoshan .

LANGMUIR, 2011, 27 (13) :8036-8043

[30] Biocompatible Magnetofluorescent Probes: Luminescent Silicon Quantum Dots Coupled with Superparamagnetic Iron(III) Oxide [J].

Erogbogbo, Folarin ;

Yong, Ken-Tye ;

Hu, Rui ;

Law, Wing-Cheung ;

Ding, Hong ;

Chang, Ching-Wen ;

Prasad, Paras N. ;

Swihart, Mark T. .

ACS NANO, 2010, 4 (09) :5131-5138

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