Effect of microwave radiation on optical characteristics of thin gold films
The possibility to use a complex of chemical and physical factors to form sensor surface with tunable properties was considered. It was demonstrated that the simultaneous treatment of thin gold films with guanidine thiocyanate and microwave radiation results in changes in the width of the surface pl...
Saved in:
| Date: | 2011 |
|---|---|
| Main Author: | |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2011
|
| Series: | Semiconductor Physics Quantum Electronics & Optoelectronics |
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/117704 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Effect of microwave radiation on optical characteristics of thin gold films / P.M. Boltovets // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2011. — Т. 14, № 2. — С. 209-212.. — Бібліогр.: 8 назв. — англ. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-117704 |
|---|---|
| record_format |
dspace |
| spelling |
nasplib_isofts_kiev_ua-123456789-1177042025-06-03T16:28:47Z Effect of microwave radiation on optical characteristics of thin gold films Boltovets, P.M. The possibility to use a complex of chemical and physical factors to form sensor surface with tunable properties was considered. It was demonstrated that the simultaneous treatment of thin gold films with guanidine thiocyanate and microwave radiation results in changes in the width of the surface plasmon resonance curve, its amplitude and position of its minimum. Thereby, the combination of these two factors can allow obtaining surface structures with controllable parameters. 2011 Article Effect of microwave radiation on optical characteristics of thin gold films / P.M. Boltovets // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2011. — Т. 14, № 2. — С. 209-212.. — Бібліогр.: 8 назв. — англ. 1560-8034 PACS 07.07.Df, 61.80.-x, 73.20.Mf, 78.20.-e, 78.70.Gq https://nasplib.isofts.kiev.ua/handle/123456789/117704 en Semiconductor Physics Quantum Electronics & Optoelectronics application/pdf Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
The possibility to use a complex of chemical and physical factors to form sensor surface with tunable properties was considered. It was demonstrated that the simultaneous treatment of thin gold films with guanidine thiocyanate and microwave radiation results in changes in the width of the surface plasmon resonance curve, its amplitude and position of its minimum. Thereby, the combination of these two factors can allow obtaining surface structures with controllable parameters. |
| format |
Article |
| author |
Boltovets, P.M. |
| spellingShingle |
Boltovets, P.M. Effect of microwave radiation on optical characteristics of thin gold films Semiconductor Physics Quantum Electronics & Optoelectronics |
| author_facet |
Boltovets, P.M. |
| author_sort |
Boltovets, P.M. |
| title |
Effect of microwave radiation on optical characteristics of thin gold films |
| title_short |
Effect of microwave radiation on optical characteristics of thin gold films |
| title_full |
Effect of microwave radiation on optical characteristics of thin gold films |
| title_fullStr |
Effect of microwave radiation on optical characteristics of thin gold films |
| title_full_unstemmed |
Effect of microwave radiation on optical characteristics of thin gold films |
| title_sort |
effect of microwave radiation on optical characteristics of thin gold films |
| publisher |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| publishDate |
2011 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/117704 |
| citation_txt |
Effect of microwave radiation on optical characteristics of thin gold films / P.M. Boltovets // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2011. — Т. 14, № 2. — С. 209-212.. — Бібліогр.: 8 назв. — англ. |
| series |
Semiconductor Physics Quantum Electronics & Optoelectronics |
| work_keys_str_mv |
AT boltovetspm effectofmicrowaveradiationonopticalcharacteristicsofthingoldfilms |
| first_indexed |
2025-11-30T23:47:38Z |
| last_indexed |
2025-11-30T23:47:38Z |
| _version_ |
1850261068026216448 |
| fulltext |
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2011. V. 14, N 2. P. 209-212.
PACS 07.07.Df, 61.80.-x, 73.20.Mf, 78.20.-e, 78.70.Gq
Effect of microwave radiation on optical characteristics
of thin gold films
P.M. Boltovets
V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine
41, prospect Nauky, 03028 Kyiv, Ukraine
Phone: (380-44) 525-56-26; fax: (380-44) 525-83-42; e-mail: pboltovec@mail.ru
Abstract. The possibility to use a complex of chemical and physical factors to form
sensor surface with tunable properties was considered. It was demonstrated that the
simultaneous treatment of thin gold films with guanidine thiocyanate and microwave
radiation results in changes in the width of the surface plasmon resonance curve, its
amplitude and position of its minimum. Thereby, the combination of these two factors
can allow obtaining surface structures with controllable parameters.
Keywords: thin gold films, microwave radiation, surface plasmon resonance.
Manuscript received 24.11.10; accepted for publication 16.03.11; published online 30.06.11.
1. Introduction
One of the topical problems in up to date materials
science is development of new approaches to creation of
complex surface architectures with controllable
properties for further applications in sensor systems.
With this aim, different methods to form complex
structures at the surface can be usually used, namely:
chemical [1], biological [2], physical [3] phenomena and
processes.
In particular, microwave radiation along with
gamma-radiation and ultrasound processing is
extensively used for modification of surfaces of different
complex materials in microelectronic technologies [4].
However, its influence on properties of thin gold films
widely used in sensor devices (especially in devices
based on the surface plasmon resonance effect) has not
been studied sufficiently yet.
The aim of this work was to investigate the
influence of microwave radiation on the optical
properties of thin gold films and their possible
restructurization. Besides, chemically active small
molecules, e.g. thiocyanate (NCS), can cause some
modification of a near-surface layer in the gold film
during interaction with it [5]. In particular, whereas
sulfur atoms bind the surface due to their capacity to
bind three atoms of Au at once, CN group can form a
complex compound with the gold atom [6] by tearing it
off the surface.
Therefore, it seemed reasonable to investigate the
possibility of the mutual effect of the both factors
(chemical treatment of the surface and microwave
irradiation) on such characteristics of the gold film as the
width of the SPR curve, its amplitude and position of the
SPR minimum for the purpose to develop sensor
surfaces with tunable properties.
2. Experimental
Glass plates (refractive index n = 1.61) with an as-
sputtered (through an adhesive Cr interlayer 1–1.5 nm
thick) gold layer 50 nm thick [7] were treated in series
with ethanol, ‘piranha’ (mixture of 30% H2O2 and 98%
H2SO4 in the ratio of 1:3), water, ethanol, isopropyl
alcohol to remove organic contaminations.
To irradiate the samples, a magnetron with
ν = 2.45 GHz, Р = 7.5 W/cm2 was used. Short series of
sample irradiations for 2-3 s were carried out for 10 and
20 s. Solution of guanidine thiocyanate (GNCS) was
prepared immediately before the experiment.
The following approaches to surface treatment
were compared:
(a) irradiation in air;
(b) irradiation in water;
(c) irradiation in 0.01 M GNCS;
(d) irradiation in 0.1 M GNCS;
(e) irradiation in 1 M GNCS.
© 2011, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
209
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2011. V. 14, N 2. P. 209-212.
0 100 200 300 400 500 600
-6000
-4000
-2000
0
2000
4000
6000
8000
reference
20 s, air
in a week
in
te
ns
ity
steps
0 100 200 300 400 500 600
-6000
-4000
-2000
0
2000
4000
6000
8000
reference
20 s, H2O
in a week
in
te
ns
ity
steps
a b
0 100 200 300 400 500 600
-6000
-4000
-2000
0
2000
4000
6000
8000
reference
20 s, GNCS 0.01 M
in a week
in
te
ns
ity
steps
0 100 200 300 400 500 600
-6000
-4000
-2000
0
2000
4000
6000
8000
reference
20 s, GNCS 0.1 M
in a week
in
te
ns
ity
steps
d c
0 100 200 300 400 500 600
-6000
-4000
-2000
0
2000
4000
6000
8000
reference
20 s, GNCS 1 M
in a week
in
te
ns
ity
steps
e
Fig. 1. The influence of microwave irradiation on the shape and position of the SPR curve: (a) irradiation in air, (b) irradiation
in water, (c) irradiation in 0.01 M GNCS, (d) irradiation in 0.1 M GNCS, (e) irradiation in 1 M GNCS.
© 2011, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
210
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2011. V. 14, N 2. P. 209-212.
150
200
250
300
410
415
420
425
430
435
440
10500
11000
11500
12000
12500
reference
experiment
m
in
im
um
p
os
iti
on
amplitu
de
width
150
200
250
300
410
415
420
425
430
435
440
10500
11000
11500
12000
12500
m
in
im
um
p
os
iti
on
width
amplitu
de
reference
experiment
a b
150
200
250
300
410
415
420
425
430
435
440
10500
11000
11500
12000
12500
m
in
im
um
p
os
iti
on
width amplitu
de
reference
experiment
150
180
210
240
270
300
410
415
420
425
430
435
440
10500
11000
11500
12000
12500
m
in
im
um
p
os
iti
on
width
amplitu
de
reference
experiment
d c
150
200
250
300
410
415
420
425
430
435
440
10500
11000
11500
12000
12500
m
in
im
um
p
os
iti
on
width
amplitu
de
reference
experiment
e
Fig. 2. Distribution of the data concerning the width of the curve, its amplitude and minimum position for different types of
the surface treatment: (a) irradiation in air, (b) irradiation in water, (c) irradiation in 0.01 M GNCS, (d) irradiation in 0.1 M
GNCS, (e) irradiation in 1 M GNCS.
© 2011, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
211
Semiconductor Physics, Quantum Electronics & Optoelectronics, 2011. V. 14, N 2. P. 209-212.
SPR spectrometer “BioHelper-01” with an open
measurement architecture was used for investigations of
changes in optical characteristics of thin gold films
owing to modification of the surface [8]. The instrument
is based on a mechanically scanning semiconductor laser
(650 nm) with an angular resolution of 0.005° and a
fixed cylindrical glass prism. Single scans took 0.4 s and
covered 23°.
Glass plates were fixed on a supporting glass prism
(refractive index n = 1.61). Optical contact was provided
using an immersion liquid (polyphenyl ether, refractive
index n = 1.6). Four measurements were performed at
each sample. Measurements were repeated in a week
after the irradiation.
3. Results and discussion
Short series of sample irradiations for 2-3 s carried out
for 10 s did not allow to obtain statistically reliable
results, though minor variation in the position of the SPR
minimum were observed for samples treated by
microwave radiation as compared with untreated ones
(data are not shown). In the case of the short series of
sample irradiations for 20 s, a well-defined tendency to
the shift of the SPR minimum position to the increase of
the SPR angle as well as diminution of the amplitude
and slight broadening the SPR curve (Fig. 1).
However, no direct correlation between the GNCS
concentration and the level of manifestation of the
observed effect was found. Also, there was no
significant difference between the results of
measurements carried out in air and in the solution.
Measurements that were carried out in a week
demonstrated that except the case of irradiation in air
there was no surface relaxation, and the minimum of the
reflected light remained shifted relative to its position in
reference measurements.
More detailed analysis of the curve parameters
shows that in the case of irradiation in air there is no
well-defined clusterization of the indications before and
after irradiation for such parameters as the width of the
curve and minimum position. However, some tendency
to more clear discrimination of the data before and after
irradiation is visible for the amplitude (Fig. 2a).
However, in water medium the distribution of the
data concerning the width of the curve and position of
the minimum is better, whereas the change in the
amplitude after irradiation is less pronounced (Fig. 2b).
A positive tendency to clusterization by all three
parameters is manifested for the case of irradiation of the
samples in the GNCS 0.01 M solution (Fig. 2c) as well
as in the 0.1 M one (Fig. 2d). However, increase in the
GNCS concentration results in the decline of the
clusterization level (Fig. 2e). It is most visible for the
width and amplitude of the curve.
In general, it is possible to state that concerning the
width of the SPR curve, its amplitude and minimum
position the values of these parameters form well-
defined clusters for treated and untreated sensor surface
except cases of irradiation in air and in high
concentration of GNCS. Besides, the clear regularity
concerning the broadening of the SPR curve, decrease in
its amplitude and increase of the SPR angle is observed.
It can serve as an evidence of the decrease in the
thickness of the films under consideration as a
consequence of chemical treatment as well as possible
formation of nanostructured architectures under
microwave radiation. Thereby, the combination of these
two factors can allow obtaining surface structures with
controllable parameters.
References
1. P.M. Boltovets, S.A. Kravchenko, B.A. Snopok,
Building interfacial nanostructures by size-
controlled chemical etching // Plasmonics, 5(4),
p. 395-403 (2010).
2. E. Brynda, M. Houska, A. Brandenburg,
A. Wikerstal, Optical sensors for real-time
measurement of analytes in blood plasma //
Biosensors and Bioelectronics, 17, p. 665 (2002).
3. S.A. Zynio, A.V. Samoylov, E.R. Surovtseva,
Y.M. Shirshov, V.M. Mirsky // Sensors, 2, p. 62-70
(2002).
4. A.B. Kamalov, Modification of Au-Ti (W, Cr,
TiBx)-GaAs contacts properties caused by external
influences // Radioelectron. Communs. Systems, 52
(3), p. 160-164 (2009).
5. P.M. Boltovets, N.S. Dyachenko, B.A. Snopok,
Yu.M. Shirshov, Ya.D. Lampeka, Protein-
orientating structures: thiocyanate layers as support
for immobilization of bioreceptors // Proc. SPIE,
4425, p. 189-193 (2001).
6. L. Polling, P. Polling, Chemistry. Moscow, Mir,
1978 (in Russian).
7. G.V. Beketov, Yu.M. Shirshov, O.V. Shynkarenko,
V.I. Chegel, Surface plasmon resonance
spectroscopy: prospects of superstate refractive
index variation for separate extraction of molecular
layer parameters // Sensors and Actuators B, 48,
p. 432-438 (1998).
8. B. Snopok, M. Yurchenko, L. Szekely, G. Klein,
E. Kasuba, SPR based immuno-capture approach
for in vitro analysis of protein complex formation:
mapping of MRS18-2 binding site on
retinoblastoma protein // Anal. Bioanal. Chem. 386,
p. 2063-2073 (2006).
© 2011, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
212
|