Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 11, Pages 4169-4173Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am201013n
Keywords
quantum dot; gold nanoparticle; self-assembly; fluorescence quenching; CdTe; nanoparticle assembly
Funding
- MEXT, Japan
- JSPS
- Ministry of Education, Culture, Sports, Science and Technotogy (MEXT), Japan
- Grants-in-Aid for Scientific Research [20245001, 22350076, 22655059, 10J02318] Funding Source: KAKEN
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A simple approach to the creation of colloidal assemblies is in high demand for the development of functional devices. Here, we present the preparation of CdTe-QD (quantum dot) networks in as little as I day simply by pH modification without the use of oxidants. The QD network was tractable in water and casting from a droplet produced a porous networked film on both hydrophobic and hydrophilic solid substrates. Further, we found that citrate-protected gold nanoparticles (AuNPs, d = 5 nm) could be incorporated into the QD networks to afford a QD/Au composite network, and that the fluorescence from the QDs was largely decreased by the addition of a small proportion of AuNPs (QD:AuNP = 99.4:0.6), probably due to the efficient charge transfer through the network. These data indicate that our method is suitable for application to the creation of metal/QD hybrid materials that can be integrated into wet-based processes.
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