High frequency transmission properties of printed graphene

Research output: Contribution to conferenceConference AbstractScientific

Abstract

The microwave properties of graphene are of interest because of possible graphene applications in microwave components and devices. High frequency transmission properties of monolayer graphene have been studied recently. Printing techniques are competitive alternatives to conventional photolithography for the production of electronic devices with advantages of low cost, ease of mass production, and flexibility. It is important to know the microwave properties of printed graphene in term of its usage in printed radio components. This paper presents experimental work on study of high frequency transmission properties of printed graphene from DC to 5 GHz. Test structures were copper coplanar waveguides (CPW) fabricated on FR4 substrates. Three CPWs were placed on each substrate. One CPW was used as a reference. Central parts of two others CPWs (30 mm and 10 mm long correspondently) were replaced by electrodes with the same geometries but made of printed graphene. Graphene electrodes were printed by screen printing method. Commercial Vorbeck inks S301 and S701 were used in the printing process [4]. Graphene structures were printed on PET ST 506 flexible substrates. Silver paste was used to make a contact between copper and graphene parts of the CPW-line. The S-parameters of CPWs were measured over the frequency range DC-5 GHz using a network analyser. CPW lumped element models were created which includes lumped element models of copper and graphene parts of CPW and contact resistance between them. Contact resistance of the interface between copper and graphene were calculated from the resistance difference of the short and long graphene CPW-lines. Transmission properties of printed graphene were extracted by fitting experimental results to the model. Result shows that high frequency sheet resistance (defined as the real part of sheet impedance) of printed graphene depends on number of printed layers. The lowest RF sheet resistivity 9.1 Ohm/square was obtained for S301 inks printed in three layers. This value is in good agreement with the DC sheet resistance extraction. It was observed that in some CPWs insertion loss was smaller at higher frequencies than it could be expected for materials with such resistance. Possible explanation of this effect is that resistance of printed graphene could decrease at higher frequencies due to capacitive coupling between graphene flakes. Achievable parameters of RF components such antennas and CPWs made of printed graphene are estimated.
Original languageEnglish
Publication statusPublished - 2015
EventGraphene Week 2015 - Manchester, United Kingdom
Duration: 22 Jun 201526 Jun 2015

Conference

ConferenceGraphene Week 2015
CountryUnited Kingdom
CityManchester
Period22/06/1526/06/15

Fingerprint

Graphene
Coplanar waveguides
Copper
Telephone lines
Sheet resistance
Microwaves
Contact resistance
Ink
Printing
Substrates
Electrodes
Screen printing
Scattering parameters
Photolithography
Insertion losses
Monolayers
Silver

Keywords

  • graphene
  • microwave properties
  • printed graphene
  • graphene flakes
  • transmission line measurements

Cite this

Ermolov, V., & Saijets, J. (2015). High frequency transmission properties of printed graphene. Abstract from Graphene Week 2015, Manchester, United Kingdom.
Ermolov, Vladimir ; Saijets, Jan. / High frequency transmission properties of printed graphene. Abstract from Graphene Week 2015, Manchester, United Kingdom.
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abstract = "The microwave properties of graphene are of interest because of possible graphene applications in microwave components and devices. High frequency transmission properties of monolayer graphene have been studied recently. Printing techniques are competitive alternatives to conventional photolithography for the production of electronic devices with advantages of low cost, ease of mass production, and flexibility. It is important to know the microwave properties of printed graphene in term of its usage in printed radio components. This paper presents experimental work on study of high frequency transmission properties of printed graphene from DC to 5 GHz. Test structures were copper coplanar waveguides (CPW) fabricated on FR4 substrates. Three CPWs were placed on each substrate. One CPW was used as a reference. Central parts of two others CPWs (30 mm and 10 mm long correspondently) were replaced by electrodes with the same geometries but made of printed graphene. Graphene electrodes were printed by screen printing method. Commercial Vorbeck inks S301 and S701 were used in the printing process [4]. Graphene structures were printed on PET ST 506 flexible substrates. Silver paste was used to make a contact between copper and graphene parts of the CPW-line. The S-parameters of CPWs were measured over the frequency range DC-5 GHz using a network analyser. CPW lumped element models were created which includes lumped element models of copper and graphene parts of CPW and contact resistance between them. Contact resistance of the interface between copper and graphene were calculated from the resistance difference of the short and long graphene CPW-lines. Transmission properties of printed graphene were extracted by fitting experimental results to the model. Result shows that high frequency sheet resistance (defined as the real part of sheet impedance) of printed graphene depends on number of printed layers. The lowest RF sheet resistivity 9.1 Ohm/square was obtained for S301 inks printed in three layers. This value is in good agreement with the DC sheet resistance extraction. It was observed that in some CPWs insertion loss was smaller at higher frequencies than it could be expected for materials with such resistance. Possible explanation of this effect is that resistance of printed graphene could decrease at higher frequencies due to capacitive coupling between graphene flakes. Achievable parameters of RF components such antennas and CPWs made of printed graphene are estimated.",
keywords = "graphene, microwave properties, printed graphene, graphene flakes, transmission line measurements",
author = "Vladimir Ermolov and Jan Saijets",
note = "LIS: Abstract reviewed Project code: 100690 ; Graphene Week 2015 ; Conference date: 22-06-2015 Through 26-06-2015",
year = "2015",
language = "English",

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Ermolov, V & Saijets, J 2015, 'High frequency transmission properties of printed graphene' Graphene Week 2015, Manchester, United Kingdom, 22/06/15 - 26/06/15, .

High frequency transmission properties of printed graphene. / Ermolov, Vladimir; Saijets, Jan.

2015. Abstract from Graphene Week 2015, Manchester, United Kingdom.

Research output: Contribution to conferenceConference AbstractScientific

TY - CONF

T1 - High frequency transmission properties of printed graphene

AU - Ermolov, Vladimir

AU - Saijets, Jan

N1 - LIS: Abstract reviewed Project code: 100690

PY - 2015

Y1 - 2015

N2 - The microwave properties of graphene are of interest because of possible graphene applications in microwave components and devices. High frequency transmission properties of monolayer graphene have been studied recently. Printing techniques are competitive alternatives to conventional photolithography for the production of electronic devices with advantages of low cost, ease of mass production, and flexibility. It is important to know the microwave properties of printed graphene in term of its usage in printed radio components. This paper presents experimental work on study of high frequency transmission properties of printed graphene from DC to 5 GHz. Test structures were copper coplanar waveguides (CPW) fabricated on FR4 substrates. Three CPWs were placed on each substrate. One CPW was used as a reference. Central parts of two others CPWs (30 mm and 10 mm long correspondently) were replaced by electrodes with the same geometries but made of printed graphene. Graphene electrodes were printed by screen printing method. Commercial Vorbeck inks S301 and S701 were used in the printing process [4]. Graphene structures were printed on PET ST 506 flexible substrates. Silver paste was used to make a contact between copper and graphene parts of the CPW-line. The S-parameters of CPWs were measured over the frequency range DC-5 GHz using a network analyser. CPW lumped element models were created which includes lumped element models of copper and graphene parts of CPW and contact resistance between them. Contact resistance of the interface between copper and graphene were calculated from the resistance difference of the short and long graphene CPW-lines. Transmission properties of printed graphene were extracted by fitting experimental results to the model. Result shows that high frequency sheet resistance (defined as the real part of sheet impedance) of printed graphene depends on number of printed layers. The lowest RF sheet resistivity 9.1 Ohm/square was obtained for S301 inks printed in three layers. This value is in good agreement with the DC sheet resistance extraction. It was observed that in some CPWs insertion loss was smaller at higher frequencies than it could be expected for materials with such resistance. Possible explanation of this effect is that resistance of printed graphene could decrease at higher frequencies due to capacitive coupling between graphene flakes. Achievable parameters of RF components such antennas and CPWs made of printed graphene are estimated.

AB - The microwave properties of graphene are of interest because of possible graphene applications in microwave components and devices. High frequency transmission properties of monolayer graphene have been studied recently. Printing techniques are competitive alternatives to conventional photolithography for the production of electronic devices with advantages of low cost, ease of mass production, and flexibility. It is important to know the microwave properties of printed graphene in term of its usage in printed radio components. This paper presents experimental work on study of high frequency transmission properties of printed graphene from DC to 5 GHz. Test structures were copper coplanar waveguides (CPW) fabricated on FR4 substrates. Three CPWs were placed on each substrate. One CPW was used as a reference. Central parts of two others CPWs (30 mm and 10 mm long correspondently) were replaced by electrodes with the same geometries but made of printed graphene. Graphene electrodes were printed by screen printing method. Commercial Vorbeck inks S301 and S701 were used in the printing process [4]. Graphene structures were printed on PET ST 506 flexible substrates. Silver paste was used to make a contact between copper and graphene parts of the CPW-line. The S-parameters of CPWs were measured over the frequency range DC-5 GHz using a network analyser. CPW lumped element models were created which includes lumped element models of copper and graphene parts of CPW and contact resistance between them. Contact resistance of the interface between copper and graphene were calculated from the resistance difference of the short and long graphene CPW-lines. Transmission properties of printed graphene were extracted by fitting experimental results to the model. Result shows that high frequency sheet resistance (defined as the real part of sheet impedance) of printed graphene depends on number of printed layers. The lowest RF sheet resistivity 9.1 Ohm/square was obtained for S301 inks printed in three layers. This value is in good agreement with the DC sheet resistance extraction. It was observed that in some CPWs insertion loss was smaller at higher frequencies than it could be expected for materials with such resistance. Possible explanation of this effect is that resistance of printed graphene could decrease at higher frequencies due to capacitive coupling between graphene flakes. Achievable parameters of RF components such antennas and CPWs made of printed graphene are estimated.

KW - graphene

KW - microwave properties

KW - printed graphene

KW - graphene flakes

KW - transmission line measurements

M3 - Conference Abstract

ER -

Ermolov V, Saijets J. High frequency transmission properties of printed graphene. 2015. Abstract from Graphene Week 2015, Manchester, United Kingdom.