Microwave-enhanced reaction rates for nanoparticle synthesis

被引:434
作者
Gerbec, JA
Magana, D
Washington, A
Strouse, GF [1 ]
机构
[1] Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA
[2] Univ Calif Santa Barbara, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA
关键词
D O I
10.1021/ja052463g
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Microwave reactor methodologies are unique in their ability to be scaled-up without suffering thermal gradient effects, providing a potentially industrially important improvement in nanocrystal synthetic methodology over convective methods. Synthesis of high-quality, near monodispersity nanoscale InGaP, InP, and CdSe have been prepared via direct microwave heating of the molecular precursors rather than convective heating of the solvent. Microwave dielectric heating not only enhances the rate of formation, it also enhances the material quality and size distributions. The reaction rates are influenced by the microwave field and by additives. The final quality of the microwave-generated materials depends on the reactant choice, the applied power, the reaction time, and temperature. CdSe nanocrystals prepared in the presence of a strong microwave absorber exhibit sharp excitonic features and a QY of 68% for microwave-grown materials. InGaP and InP are rapidly formed at 280 degrees C in minutes, yielding clean reactions and monodisperse size distributions that require no size-selective precipitation and result in the highest out of batch quantum efficiency reported to date of 15% prior to chemical etching. The use of microwave (MW) methodology is readily scalable to larger reaction volumes, allows faster reaction times, removes the need for high-temperature injection, and suggests a specific microwave effect may be present in these reactions.
引用
收藏
页码:15791 / 15800
页数:10
相关论文
共 51 条
[1]   Ionic liquids for the convenient synthesis of functional nanoparticles and other inorganic nanostructures [J].
Antonietti, M ;
Kuang, DB ;
Smarsly, B ;
Yong, Z .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2004, 43 (38) :4988-4992
[2]   Formation of high quality InP and InAs nanocrystals in a noncoordinating solvent [J].
Battaglia, D ;
Peng, XG .
NANO LETTERS, 2002, 2 (09) :1027-1030
[3]   Microwave synthesis and characterization of Co-ferrite nanoparticles [J].
Bensebaa, F ;
Zavaliche, F ;
L'Ecuyer, P ;
Cochrane, RW ;
Veres, T .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2004, 277 (01) :104-110
[4]   Future directions in solid state chemistry: report of the NSF-sponsored workshop [J].
Cava, RJ ;
DiSalvo, FJ ;
Brus, LE ;
Dunbar, KR ;
Gorman, CB ;
Haile, SM ;
Interrante, LV ;
Musfeldt, JL ;
Navrotsky, A ;
Nuzzo, RG ;
Pickett, WE ;
Wilkinson, AP ;
Ahn, C ;
Allen, JW ;
Burns, PC ;
Ceder, G ;
Chidsey, CED ;
Clegg, W ;
Coronado, E ;
Dai, HJ ;
Deem, MW ;
Dunn, BS ;
Galli, G ;
Jacobson, AJ ;
Kanatzidis, M ;
Lin, WB ;
Manthiram, A ;
Mrksich, M ;
Norris, DJ ;
Nozik, AJ ;
Peng, XG ;
Rawn, C ;
Rolison, D ;
Singh, DJ ;
Toby, BH ;
Tolbert, S ;
Wiesner, UB ;
Woodward, PM ;
Yang, PD .
PROGRESS IN SOLID STATE CHEMISTRY, 2002, 30 (1-2) :1-101
[5]   Size-controlled growth of CdSe nanocrystals in microfluidic reactors [J].
Chan, EM ;
Mathies, RA ;
Alivisatos, AP .
NANO LETTERS, 2003, 3 (02) :199-201
[6]  
CHEN XS, 2005, J AM CHEM SOC
[7]   Ionic liquids: solvent properties and organic reactivity [J].
Chiappe, C ;
Pieraccini, D .
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 2005, 18 (04) :275-297
[8]   Inorganic clusters as single-source precursors for preparation of CdSe, ZnSe, and CdSe/ZnS nanomaterials [J].
Cumberland, SL ;
Hanif, KM ;
Javier, A ;
Khitrov, GA ;
Strouse, GF ;
Woessner, SM ;
Yun, CS .
CHEMISTRY OF MATERIALS, 2002, 14 (04) :1576-1584
[9]  
Eames J, 1999, SYNLETT, P1211
[10]   Self-assembly of ordered, robust, three-dimensional gold nanocrystal/silica arrays [J].
Fan, HY ;
Yang, K ;
Boye, DM ;
Sigmon, T ;
Malloy, KJ ;
Xu, HF ;
López, GP ;
Brinker, CJ .
SCIENCE, 2004, 304 (5670) :567-571