
54-6 Chemical Variables
of particular analytes present in a mixture. Complex features of output patterns generated by vary-
ing
op
erating
te
mperature
ha
ve
be
en
us
ed
to im
prove
th
e
se
lectivity
of ti
n
ox
ide
se
nsors
in a ra
nge
of
re
search
e
orts
(
Huang
e
tal
., 2
007;
V
ergara
e
tal
., 2
007)
.
Ar
rays:
Va
riations
in th
e
sp
eed
an
d
de
gree
of re
action
am
ong
di
erent
ma
terials
an
d
di
erent
op
erat-
ing
te
mperatures
(f
or
me
tal–oxide
se
nsors)
an
d
sim
ilar
va
riables
wi
th
ot
her
cl
asses
of ma
terials
ca
n
be
us
ed
to cr
eate
pa
tterns
th
at
ad
vance
se
nsors
fr
om
be
ing
br
oadly
se
lective
to be
ing
se
miselective
. Aw
ide
va
riety
of ar
rays
ha
ve
be
en
us
ed
to cr
eate
bo
th
el
ectronic ...