A universal growth strategy for DNA-programmed quantum dots on graphene oxide surfaces.

Nanotechnology

College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People's Republic of China.

Published: March 2020

The emerging materials of semiconductor quantum dots/graphene oxide (QDs/GO) hybrid composites have recently attracted intensive attention in materials science and technology due to their potential applications in electronic and photonic devices. Here, a simple and universal strategy to produce DNA-programmed semiconductor quantum dots/graphene oxide (QDs/GO) hybrid composites with controllable sizes, shapes, compositions, and surface properties is reported. This proof-of-concept work successfully demonstrates the use of sulfhydryl modified single-stranded DNA (S-ssDNA) as a 'universal glue' which can adsorb onto GO easily and provide the growth sites to synthesize CdS QDs, CdSe QDs, CdTe QDs and CdTeSe QDs with distinctive sizes, shapes and properties. Also, adapting this method, other graphene oxide-based hybrid materials which are easily synthesized in aqueous solution, including oxides, core-shell structure QDs and metal nanocrystals, would be possible. This method provided a universal strategy for the synthesis and functional realization of graphene -based nanomaterials.

Download full-text PDF

Source
http://dx.doi.org/10.1088/1361-6528/ab7c42DOI Listing

Publication Analysis

Top Keywords

semiconductor quantum
8
quantum dots/graphene
8
dots/graphene oxide
8
oxide qds/go
8
qds/go hybrid
8
hybrid composites
8
universal strategy
8
sizes shapes
8
qds
5
universal growth
4

Similar Publications

Fluorine-expedited nitridation of layered perovskite SrTiO for visible-light-driven photocatalytic overall water splitting.

Nat Commun

January 2025

Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, China.

Photocatalytic overall water splitting is a promising approach for a sustainable hydrogen provision using solar energy. For sufficient solar energy utilization, this reaction ought to be operated based on visible-light-active semiconductors, which is very challenging. In this work, an F-expedited nitridation strategy is applied to modify the wide-bandgap semiconductor SrTiO for visible-light-driven photocatalytic overall water splitting.

View Article and Find Full Text PDF

Emergence of ferroelectricity in Sn-based perovskite semiconductor films by iminazole molecular reconfiguration.

Nat Commun

January 2025

State Key Laboratory of Photovoltaic Science and Technology, Department of Materials Science, Institute of Optoelectronics, Fudan University, Shanghai, 200433, China.

Ferroelectric semiconductors have the advantages of switchable polarization ferroelectric field regulation and semiconductor transport characteristics, which are highly promising in ferroelectric transistors and nonvolatile memory. However, it is difficult to prepare a Sn-based perovskite film with both robust ferroelectric and semiconductor properties. Here, by doping with 2-methylbenzimidazole, Sn-based perovskite [93.

View Article and Find Full Text PDF
Article Synopsis
  • Excitons, which are pairs of electrons and holes held together by Coulomb forces, can form a superfluid at low temperatures due to their bosonic properties.
  • The research involves directly imaging this exciton superfluid in a specific material setup (MoSe-WSe heterostructure), demonstrating a significant level of order across the sample.
  • The study also details how variations in exciton density and temperature help construct a phase diagram, revealing that the superfluid state can persist up to 15 K, aligning well with theoretical expectations and paving the way for advancements in quantum devices and superfluid research.
View Article and Find Full Text PDF

An Automated Workflow to Discover the Structure-Stability Relations for Radiation Hard Molecular Semiconductors.

J Am Chem Soc

January 2025

Institute of Materials for Electronics and Energy Technology (i-MEET), Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Martensstraße 7, 91058 Erlangen, Germany.

Article Synopsis
  • Emerging photovoltaics require radiation-hard materials for use in outer space, but predicting their resilience to high-energy radiation is currently a challenge.
  • The research combines lab automation and machine learning to rapidly identify and test over 130 organic hole transport materials, assessing their stability under UVC light exposure.
  • Findings reveal that materials with fused aromatic rings are more stable, while certain chemical groups negatively impact stability, providing valuable insights for future molecular design in creating durable semiconductors.
View Article and Find Full Text PDF

Synergy of Facet and Defect on Carrier Dynamics of Photocatalyst Particles.

Nano Lett

January 2025

Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 21189, China.

CuO semiconductors are highly regarded in photocatalysis for their outstanding photogenerated carrier dynamics. However, the mechanisms underlying carrier separation and recombination in CuO remain elusive, largely due to the intricate interplay between defects and facet engineering. Herein, we elucidate the critical synergy between internal defects and facets in CuO for carrier dynamics.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!