[Lun, Zhaoliang;Huang, Haibin;Kalogerakis, Evangelos] Univ Massachusetts, Amherst, MA 01003 USA.^[Zou, Changqing;Tan, Ping;Zhang, Hao] Simon Fraser Univ, Burnaby, BC, Canada.^[Zou, Changqing] Hengyang Normal Univ, Hengyang, Peoples R China.^[Cani, Marie-Paule] CNRS, Ecole Polytech, Paris, France.