Preparation of LiNbO3 nanoparticles using poly(l-lysine) as a biomolecular additive

Youngjoon Lim, Sang Yup Lee

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The effects of poly(l-lysine) as a biomolecular additive on the synthesis of LiNbO3 were investigated. PLL is a widely-studied biomolecule containing amino groups that can interact with solid inorganic clusters. The addition of PLL to a LiNbO3 precursor solution enhanced the aggregation of the produced LiNbO3 nanoparticles. This aggregation was induced by the electrical attraction of PLL with LiNbO3 nanoparticles, and was enhanced with increasing PLL molecular weight. Furthermore, the association of PLL with LiNbO3 nanoparticles was increased by the addition of methanol, which enhanced the miscibility of PLL with the precursor solution working as a co-solvent. The LiNbO3 nanoparticles generated with PLL exhibited piezoelectric properties without post-thermal treatment, suggesting that PLL contributes to the piezoelectricity. The results of this study are intriguing in terms of the potential for diverse engineering nanomaterials synthesis through a biomolecule that can also improve the physicochemical properties.

Original languageEnglish
Pages (from-to)92-97
Number of pages6
JournalMaterials Chemistry and Physics
Issue number1-2
Publication statusPublished - 2014 Mar 14

Bibliographical note

Funding Information:
This work was supported by the Korean Research Foundation Grant funded by the Korean Government (MOEHRD) ( KRF-2010-0016178 ). The authors wish to thank Prof. J. B. Kim at the Dept. of Mech. Eng. for performing piezoelectricity measurements.

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics


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