Chemical sensor based on ZnO thin film / by Bakar Ismail, author, Mohd. Nor Md. Yusuf, author, Wan Nurulhuda Wan Shamsuri, author, Yussof Wahab, author, Zulkafli Othaman, author, Yazid Abdul Manap, author, Regional Conference on Solid State Science and Technology (23rd : 2007 : Johor Bahru)