Molten-droplet synthesis of composite CdSe hollow nanoparticles

  title={Molten-droplet synthesis of composite CdSe hollow nanoparticles},
  author={Sravani Gullapalli and Jason M Grider and Hitesh G. Bagaria and Kyu-Sung Lee and Minjung Cho and Vicki L. Colvin and Ghassan E Jabbour and Michael S. Wong},
Many colloidal synthesis routes are not scalable to high production rates, especially for nanoparticles of complex shape or composition, due to precursor expense and hazards, low yields, and the large number of processing steps. The present work describes a strategy to synthesize hollow nanoparticles (HNPs) out of metal chalcogenides, based on the slow heating of a low-melting-point metal salt, an elemental chalcogen, and an alkylammonium surfactant in octadecene solvent. The synthesis and… 

One-Step Synthesis and Electrical Conductivity of CdSe-Based Nanocomposites

We have developed novel hydrothermal (HT) and hydrothermal microwave (HTMW) processes for the synthesis of nanocrystalline cadmium selenide via reduction using glucose and sodium sulfite. The

Hollow and mesoporous ZnTe microspheres: synthesis and visible-light photocatalytic reduction of carbon dioxide into methane

Hollow and mesoporous microstructures have been found to be an attractive class of materials due to their superior physical properties and potential applications. In the present work, a hydrothermal

Nanoparticle conversion chemistry: Kirkendall effect, galvanic exchange, and anion exchange.

The principles and examples of three major classes of conversion chemical reactions are reviewed: the Kirkendall effect for metal NPs, galvanic exchange, and anion exchange, each of which can result in void formation in NPs.

The Kirkendall Effect: its Efficacy in the Formation of Hollow Nanostructures

"The Kirkendall effect refers to the formation of the so-called ‘Kirkendall voids’ caused by the difference in diffusion rates between two species. It is a classical phenomenon in metallurgy and


A new-type photocatalyst of cadmium sulfide carbon nanotubes (CdS/CNTs) was prepared by the hydrothermal method. This as-prepared CdS/CNTs composite photocatalyst was proved to exhibit an excellent

Irradiation-induced nano-voids in strained tin precipitates in silicon

We report on self-assembling of spherically shaped voids in nanometer size strained Sn precipitates after irradiation with He+ ions in different conditions. It is found that high-temperature

Strain‐Driven Self‐Assembling of Nano‐Voids and Formation of Core–Shell Bubbles in SiSn/Si Layers

  • P. Gaiduk
  • Materials Science
    physica status solidi (b)
  • 2018
Self‐assembling of nanometer size voids in strained Sn precipitates after hot He+ ion implantation is investigated by transmission electron microscopy (TEM). It is deduced from TEM study that

Recent developments and directions in printed nanomaterials.

This review surveys several recent developments in printing of nanomaterials for contacts, transistors, sensors of various kinds, light-emitting diodes, solar cells, memory devices, and bone and organ implants and presents a view of the future development of this field.



Nearly monodisperse and shape-controlled CdSe nanocrystals via alternative routes: nucleation and growth.

Experimental results indicate that coordinating solvents and two ligands with distinguishable coordinating abilities are both not intrinsic requirements for the growth of elongated CdSe nanocrystals.

Sulfidation of cadmium at the nanoscale.

This work investigates the evolution of structures that result when spherical Cd nanoparticles of a few hundred nanometers in diameter react with dissolved molecular sulfur species in solution to form hollow CdS, and obtains a lower symmetry structure, in which the unreacted metal core and the coalesced vacancies separate into two distinct spherical caps, minimizing the metal/void interface.

A new route to zinc-blende CdSe nanocrystals: mechanism and synthesis.

A much cheaper and greener Non-TOP-Based route for the synthesis of a size series of high-quality zinc-blende (cubic) CdSe nanocrystals with sharp ultraviolet and visible absorption peaks, controllable size, and high PL quantum yield without any size sorting is developed.

Mechanisms of the Shape Evolution of CdSe Nanocrystals

The temporal shape evolution of CdSe quantum confined nanorods (quantum rods) in nonaqueous solvents with organometallic precursors was studied quantitatively and systematically. The experimental

Physical Origin of the Impact of Different Nanocrystal Surface Modifications on the Performance of CdSe/P3HT Hybrid Solar Cells

Alkylamines were recently found to be suitable ligands for CdSe quantum dots with respect to applications in polymer/nanoparticle solar cells. However, the physical origin of the superior performance

Phosphine-Free Synthesis of High-Quality CdSe Nanocrystals in Noncoordination Solvents: Activating Agent and Nucleating Agent Controlled Nucleation and Growth

CdSe nanocrystals (NCs) are prepared in noncoordination solvents (1-octadecene (ODE) and paraffin liquid) with long-chain primary alkylamine as the sole ligand, ODE-Se, and cadmium fatty acid salt as

Synthesis of CdSe and CdTe nanocrystals without precursor injection.

How to design a noninjection synthesis for making high-quality CdSe and CdTe nanocrystals without nucleation initiators is reported, which results in products with poor monodispersity.

Shape control of CdSe nanocrystals

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.

Nanoscale γ-AlO(OH) Hollow Spheres: Synthesis and Container-Type Functionality

AlO(OH) hollow spheres are realized via a water-in-oil (w/o) microemulsion, applying the liquid-to-liquid-phase boundary of the micellar system as a template. Scanning electron microscopy,

Investigation on the phosphine-free synthesis of CdSe nanocrystals by cadmium precursor injection

A green route for the synthesis of high quality zinc blende CdSe nanocrystals has been successfully established by using phosphine-free Se precursors combined with a cadmium precursor injection