<s>
A	O
zinc	B-Algorithm
oxide	I-Algorithm
nanorod	I-Algorithm
sensor	I-Algorithm
or	O
ZnO	B-Algorithm
nanorod	I-Algorithm
sensor	I-Algorithm
is	O
an	O
electronic	O
or	O
optical	O
device	O
detecting	O
presence	O
of	O
certain	O
gas	O
or	O
liquid	O
molecules	O
(	O
e.g.	O
</s>
