Pins comprising nanorods and attached members are provided. Two exemplary embodiments of pins are such that: the nanorod is partially embedded in the attached member; and one end of the nanorod is attached to the surface of the attached member. In some embodiments, the attached member is an optical handle....http://www.google.com.hk/patents/US8178784?utm_source=gb-gplus-share專利 US8178784 - Small pins and microscopic applications thereof