it depends upon the specific metal oxides. For zinc oxide its definitely chemical synthesis. For other metal oxides CVD is also widely used. Often gold nano particles are used as seeds for growing nano rods.
The invertion of 10G optical transceiver has greatly increase the networking speed, for the science behind the transceiver, please check website and learn about CWDM SFP transceiver, www.fiberoptictransceiver.net
The XFP (10 Gigabit Small Form Factor Pluggable) is a standard for transceivers for high-speed computer network and telecommunication links that use optical fiber.please visit www.xfptransceiver.com for more info