Particle Shape Control via Etching of Core@Shell Nanocrystals
نویسندگان
چکیده
منابع مشابه
Shape Control of Colloidal Metal Nanocrystals
reviews P. Yang et al. Colloidal metal nanoparticles are emerging as key materials for catalysis, plasmonics, sensing, and spectroscopy. Within these applications, control of nanoparticle shape lends increasing functionality and selectivity. Shape-controlled nanocrystals possess well-defined surfaces and morphologies because their nucleation and growth are controlled at the atomic level. An ove...
متن کاملUnderstanding the Effect of Hydrogen Surface Passivation and Etching on the Shape of Silicon Nanocrystals
One of the significant challenges in the use of nanocrystals, is the control of crystal shape when grown from the gas-phase. Recently, the Kortshagen group has succeeded in generating cubic Si nanocrystals in a nonequilibrium plasma. In this paper we consider the energetics of various shaped Si nanocrystals, and the role that hydrogen surface termination plays. We consider cube, truncated octah...
متن کاملShape control of near-field probes using dynamic meniscus etching.
Dynamic etching methods for fabricating fibre optic tips are explored and modelled. By vertically translating the fibre during etching by an HF solution under an organic protective layer, a variety of tip shapes were created. The probe taper lengths, cone angles and geometrical probe shapes were measured in order to evaluate the dynamic meniscus etching process. Fibre motion, etching rate, meni...
متن کاملShape, size, and assembly control of PbTe nanocrystals.
The small band gap and the large Bohr radius1 of the Pbchalcogenide enable unique optical, electrical, and chemical properties, presenting this family of materials as a good candidate for potential application in solar cells,2-4 thermoelectric (TE)5 devices, telecommunication,6 field effect transistors (FET),7 and biological imaging. Integrating Pb-chalcogenide nanostructures in these devices r...
متن کاملShape control of PbSe nanocrystals using noble metal seed particles.
We demonstrate that the shape of PbSe nanocrystals can be controlled systematically by seeding their growth with noble metal nanoparticles (Au, Ag, or Pd) and varying the seed and precursor concentrations. Cylinders (quantum rods), cubes, crosses, stars, and branched structures were produced in high yield at 150 degrees C in reaction times of a few minutes. Although their absorption spectrum do...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: ACS Nano
سال: 2018
ISSN: 1936-0851,1936-086X
DOI: 10.1021/acsnano.8b03759