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Full-Text Articles in Physics
Suppressed Carrier Scattering In Cds-Encapsulated Pbs Nanocrystal Films, Pavel Moroz, Natalia Kholmicheva, Bryan Mellott, Geethika Liyanage, Upendra Rijal, Ebin Bastola, Kyla Huband, Elena Khon, Keith Mcbride, Mikhail Zamkov
Suppressed Carrier Scattering In Cds-Encapsulated Pbs Nanocrystal Films, Pavel Moroz, Natalia Kholmicheva, Bryan Mellott, Geethika Liyanage, Upendra Rijal, Ebin Bastola, Kyla Huband, Elena Khon, Keith Mcbride, Mikhail Zamkov
Physics and Astronomy Faculty Publications
One of the key challenges facing the realization of functional nanocrystal devices concerns the development of techniques for depositing colloidal nanocrystals into electrically coupled nanoparticle solids. This work compares several alternative strategies for the assembly of such films using an all-optical approach to the characterization of electron transport phenomena. By measuring excited carrier lifetimes in either ligand-linked or matrix-encapsulated PbS nanocrystal films containing a tunable fraction of insulating ZnS domains, we uniquely distinguish the dynamics of charge scattering on defects from other processes of exciton dissociation. The measured times are subsequently used to estimate the diffusion length and the carrier …
Improving The Catalytic Activity Of Semiconductor Nanocrystals Through Selective Domain Etching, Elena Khon, Kelly Lambright, Rony S. Khnayzer, Pavel Moroz, Dimuthu Perera, Evgeniia Butaeva, Scott Lambright, Felix N. Castellano, Mikhail Zamkov
Improving The Catalytic Activity Of Semiconductor Nanocrystals Through Selective Domain Etching, Elena Khon, Kelly Lambright, Rony S. Khnayzer, Pavel Moroz, Dimuthu Perera, Evgeniia Butaeva, Scott Lambright, Felix N. Castellano, Mikhail Zamkov
Physics and Astronomy Faculty Publications
Colloidal chemistry offers an assortment of synthetic tools for tuning the shape of semiconductor nanocrystals. While many nanocrystal architectures can be obtained directly via colloidal growth, other nanoparticle morphologies require alternative processing strategies. Here, we show that chemical etching of colloidal nanoparticles can facilitate the realization of nanocrystal shapes that are topologically inaccessible by hot-injection techniques alone. The present methodology is demonstrated by synthesizing a two-component CdSe/CdS nanoparticle dimer, constructed in a way that both CdSe and CdS semiconductor domains are exposed to the external environment. This structural morphology is highly desirable for catalytic applications as it enables both reductive …