In situ modification of three-dimensional polyphenylene dendrimer-templated CuO rice-shaped architectures with electron beam irradiation

Xiaoying Qi, Yizhong Huang, Markus Klapper, Freddy Boey, Wei Huang, Steven De Feyter, Klaus Müllen, Hua Zhang

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

In this study, the high-energy electron beam of the transmission electron microscope (TEM) is utilized as an external force to in situ modify the polyphenylene dendrimer (G2Td(COOH)16) templated CuO rice-shaped architecture (RSA). By virtue of the nanoscale precision of this approach, the electron beam-modified RSA retains its rice shape while the internal primary CuO nanoparticles are converted to the Cu2O nanoparticles with increased size. Detailed investigation using a time-lapse TEM technique reveals that such a modification process is mainly constituted by two stages, involving the arrangement of the primary CuO nanoparticles and the transformation of the primary CuO into Cu2O nanoparticles. Within the modification process, the highenergy electron beam of TEM serves as the external driving force and energy resource to improve the orientation and increase the crystallinity of the single-phase CuO nanoparticles and subsequently transfer the nanoparticle phase from CuO to Cu2O. This study highlights a facile in situ way to finely tune the nanoscale morphology and chemical composition of nanoparticles and nanoparticle-based assembled structures.

Original languageEnglish
Pages (from-to)13465-13470
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number32
DOIs
StatePublished - 19 Aug 2010
Externally publishedYes

Fingerprint

Dive into the research topics of 'In situ modification of three-dimensional polyphenylene dendrimer-templated CuO rice-shaped architectures with electron beam irradiation'. Together they form a unique fingerprint.

Cite this