Journal ArticleDOI
A general and robust strategy for the synthesis of nearly monodisperse colloidal nanocrystals
TLDR
The generality of the approach is demonstrated by describing the synthesis of various sizes and architectures of metallic, ferroelectric, magnetic, semiconductor and luminescent colloidal nanocrystals, including core-shell and hollow nanostructures.Abstract:
Colloidal nanocrystals exhibit a wide range of size- and shape-dependent properties and have found application in myriad fields, incuding optics, electronics, mechanics, drug delivery and catalysis, to name but a few. Synthetic protocols that enable the simple and convenient production of colloidal nanocrystals with controlled size, shape and composition are therefore of key general importance. Current strategies include organic solution-phase synthesis, thermolysis of organometallic precursors, sol-gel processes, hydrothermal reactions and biomimetic and dendrimer templating. Often, however, these procedures require stringent experimental conditions, are difficult to generalize, or necessitate tedious multistep reactions and purification. Recently, linear amphiphilic block co-polymer micelles have been used as templates to synthesize functional nanocrystals, but the thermodynamic instability of these micelles limits the scope of this approach. Here, we report a general strategy for crafting a large variety of functional nanocrystals with precisely controlled dimensions, compositions and architectures by using star-like block co-polymers as nanoreactors. This new class of co-polymers forms unimolecular micelles that are structurally stable, therefore overcoming the intrinsic instability of linear block co-polymer micelles. Our approach enables the facile synthesis of organic solvent- and water-soluble nearly monodisperse nanocrystals with desired composition and architecture, including core-shell and hollow nanostructures. We demonstrate the generality of our approach by describing, as examples, the synthesis of various sizes and architectures of metallic, ferroelectric, magnetic, semiconductor and luminescent colloidal nanocrystals.read more
Citations
More filters
Journal ArticleDOI
Synthesis, Properties, and Applications of Hollow Micro-/Nanostructures
TL;DR: The unique properties and niche applications of the hollow structures in diverse fields, including micro-/nanocontainers and reactors, optical properties and applications, magnetic properties, energy storage, catalysis, biomedical applications, environmental remediation, and sensors are discussed.
Journal ArticleDOI
Core–shell nanoparticles: synthesis and applications in catalysis and electrocatalysis
Manoj B. Gawande,Anandarup Goswami,Tewodros Asefa,Huizhang Guo,Ankush V. Biradar,Dong Liang Peng,Radek Zboril,Rajender S. Varma +7 more
TL;DR: Synthetic methods for preparing different classes of CSNs, including the Stöber method, solvothermal method, one-pot synthetic method involving surfactants, etc., are briefly mentioned here.
Journal ArticleDOI
Green chemistry for nanoparticle synthesis
TL;DR: Several pivotal aspects of synthesis with environmental concerns are presented, involving the selection and evaluation of nontoxic capping and reducing agents, the choice of innocuous solvents and the development of energy-efficient synthetic methods.
Journal ArticleDOI
Noble metal–metal oxide nanohybrids with tailored nanostructures for efficient solar energy conversion, photocatalysis and environmental remediation
Xueqin Liu,Xueqin Liu,James Iocozzia,Yang Wang,Xun Cui,Yihuang Chen,Shiqiang Zhao,Zhen Li,Zhiqun Lin +8 more
TL;DR: In this paper, the authors focus on the significant advances in tailored nanostructures of noble metal-metal oxide nanohybrids and highlight the improvement in performance in the representative solar energy conversion applications.
Journal ArticleDOI
Generalized self-assembly of scalable two-dimensional transition metal oxide nanosheets
TL;DR: In this paper, a generalized and fundamental approach to molecular self-assembly synthesis of ultrathin 2D nanosheets of transition metal oxides by rationally employing lamellar reverse micelles is presented.
References
More filters
Journal ArticleDOI
Synthesis and characterization of nearly monodisperse CdE (E = sulfur, selenium, tellurium) semiconductor nanocrystallites
TL;DR: In this paper, a simple route to the production of high-quality CdE (E=S, Se, Te) semiconductor nanocrystallites is presented, based on pyrolysis of organometallic reagents by injection into a hot coordinating solvent.
Journal ArticleDOI
Quantum dot bioconjugates for imaging, labelling and sensing
TL;DR: This review looks at current methods for preparing QD bioconjugates as well as presenting an overview of applications, and concludes that the potential of QDs in biology has just begun to be realized and new avenues will arise as the ability to manipulate these materials improves.
Journal ArticleDOI
Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices
TL;DR: Thermal annealing converts the internal particle structure from a chemically disordered face- centered cubic phase to the chemically ordered face-centered tetragonal phase and transforms the nanoparticle superlattices into ferromagnetic nanocrystal assemblies that can support high-density magnetization reversal transitions.
Journal ArticleDOI
Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction
TL;DR: The Co₃O₄/N-doped graphene hybrid exhibits similar catalytic activity but superior stability to Pt in alkaline solutions, making it a high-performance non-precious metal-based bi-catalyst for both ORR and OER.
Journal ArticleDOI
Shape control of CdSe nanocrystals
Xiaogang Peng,Liberato Manna,Liberato Manna,Liberato Manna,Weidong Yang,Weidong Yang,Weidong Yang,Juanita N. Wickham,Juanita N. Wickham,Juanita N. Wickham,Erik C. Scher,Erik C. Scher,Erik C. Scher,Andreas Kadavanich,Andreas Kadavanich,Andreas Kadavanich,A. P. Alivisatos,A. P. Alivisatos,A. P. Alivisatos +18 more
TL;DR: Control of the growth kinetics of the II–VI semiconductor cadmium selenide can be used to vary the shapes of the resulting particles from a nearly spherical morphology to a rod-like one, with aspect ratios as large as ten to one.