The influence of size and dimension on the volume plasmon energy of nanomaterials is examined, and the effect of band-gap variation and lattice contraction is explicitly included in our improvised phenomenological model. The advantage of this improvised model is the ability to predict the volume plasmon energy for low dimensional materials, literally free from any arbitrarily adjustable parameters. We find that the volume plasmon energy increases almost exponentially with decreasing size and this increase is shown to be the most evident for nanoparticles, as compared to nanowires and nanofilms of the same material. This is largely due to the variation in the surface/volume ratio with dimension modulation. More importantly, our improvised model outperforms other reported ones, bringing our predicted results closest to available experiments. In particular, for semiconducting/semi-metal nanoarchitectures, we demonstrate that the rapid increase in volume plasmon energy of nanomaterials is a direct consequence and interplay of band-gap variation and lattice contraction.
Bibliographical noteFunding Information:
The authors acknowledge the financial supports of the National Natural Science Foundation of China under (Grant No. 51101067 ), Korea Institute of Science and Technology (KIST) (Contract No. 2E22121), National Research Foundation of Korea (NRF) (Grant No. 2011-0013201 ), Natural Science Foundation of Anhui Higher Education Institutions of China (No. KL2012B159), Open Foundation of Key Laboratory of Automobile Materials of the Ministry of Educations, Jilin University and Huaibei Normal University (No. 700435). R. Q. Zhang acknowledges the Second Stage of Brain Korea 21 Project (Division of Humantronics Information Materials) for funding.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Materials Chemistry