Purnama, I.
Kerk, I. S.
Lim, G. J.
Lew, W. S.
Article History
Received: 6 March 2014
Accepted: 3 February 2015
First Online: 4 March 2015
Competing interests
: I.P. and W.S. Lew have a patent application for this work, patent number: PCT/SG2014/000002, “A Memory Device”.