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Biaxial strain in suspended graphene membranes for piezoresistive sensing
KTH, Skolan för informations- och kommunikationsteknik (ICT), Integrerade komponenter och kretsar.ORCID-id: 0000-0003-4637-8001
KTH, Skolan för elektro- och systemteknik (EES), Mikro- och nanosystemteknik.ORCID-id: 0000-0002-0525-8647
KTH, Skolan för informations- och kommunikationsteknik (ICT), Integrerade komponenter och kretsar.ORCID-id: 0000-0003-1234-6060
KTH, Skolan för elektro- och systemteknik (EES), Mikro- och nanosystemteknik.ORCID-id: 0000-0003-3452-6361
Visa övriga samt affilieringar
2014 (Engelska)Ingår i: 2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS), IEEE , 2014, s. 1055-1058Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Pressure sensors based on suspended graphene membranes have shown extraordinary sensitivity for uniaxial strains, which originates from graphene's unique electrical and mechanical properties and thinness [1]. This work compares through both theory and experiment the effect of cavity shape and size on the sensitivity of piezoresistive pressure sensors based on suspended graphene membranes. Further, the paper analyzes the effect of both biaxial and uniaxial strain on the membranes. Previous studies examined uniaxial strain through the fabrication of long, rectangular cavities. The present work uses circular cavities of varying sizes in order to obtain data from biaxially strained graphene membranes.

Ort, förlag, år, upplaga, sidor
IEEE , 2014. s. 1055-1058
Serie
Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS), ISSN 1084-6999
Nyckelord [en]
Membranes, MEMS, Pressure sensors, Strain, Biaxial strains, Electrical and mechanical properties, Piezoresistive pressure sensors, Piezoresistive sensing, Rectangular cavity, Strained graphene, Suspended graphene, Uni-axial strains, Graphene
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
URN: urn:nbn:se:kth:diva-145475DOI: 10.1109/MEMSYS.2014.6765826ISI: 000352217500269Scopus ID: 2-s2.0-84898971449ISBN: 978-1-4799-3509-3 (tryckt)OAI: oai:DiVA.org:kth-145475DiVA, id: diva2:718604
Konferens
27th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2014; San Francisco, CA; United States; 26 January 2014 through 30 January 2014
Anmärkning

QC 20140521

Tillgänglig från: 2014-05-21 Skapad: 2014-05-21 Senast uppdaterad: 2024-03-18
Ingår i avhandling
1. Graphene-based Devices for More than Moore Applications
Öppna denna publikation i ny flik eller fönster >>Graphene-based Devices for More than Moore Applications
2016 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Moore's law has defined the semiconductor industry for the past 50 years. Devices continue to become smaller and increasingly integrated into the world around us. Beginning with personal computers, devices have become integrated into watches, phones, cars, clothing and tablets among other things. These devices have expanded in their functionality as well as their ability to communicate with each other through the internet. Further, devices have increasingly been required to have diverse of functionality. This combination of smaller devices coupled with diversification of device functionality has become known as more than Moore. In this thesis, more than Moore applications of graphene are explored in-depth.

Graphene was discovered experimentally in 2004 and since then has fueled tremendous research into its various potential applications. Graphene is a desirable candidate for many applications because of its impressive electronic and mechanical properties. It is stronger than steel, the thinnest known material, and has high electrical conductivity and mobility. In this thesis, the potentials of graphene are examined for pressure sensors, humidity sensors and transistors.

Through the course of this work, high sensitivity graphene pressure sensors are developed. These sensors are orders of magnitude more sensitive than competing technologies such as silicon nanowires and carbon nanotubes. Further, these devices are small and can be scaled aggressively.

Research into these pressure sensors is then expanded to an exploration of graphene's gas sensing properties -- culminating in a comprehensive investigation of graphene-based humidity sensors. These sensors have rapid response and recovery times over a wide humidity range. Further, these devices can be integrated into CMOS processes back end of the line.

In addition to CMOS Integration of these devices, a wafer scale fabrication process flow is established. Both humidity sensors and graphene-based transistors are successfully fabricated on wafer scale in a CMOS compatible process. This is an important step toward both industrialization of graphene as well as heterogeneous integration of graphene devices with diverse functionality. Furthermore, fabrication of graphene transistors on wafer scale provides a framework for the development of statistical analysis software tailored to graphene devices.

In summary, graphene-based pressure sensors, humidity sensors, and transistors are developed for potential more than Moore applications. Further, a wafer scale fabrication process flow is established which can incorporate graphene devices into CMOS compatible process flows back end of the line.

Ort, förlag, år, upplaga, sidor
KTH Royal Institute of Technology, 2016. s. xxvi, 79
Serie
TRITA-ICT ; 2016:17
Nyckelord
Graphene, Humidity Sensor, Pressure Sensor, GFET, CMOS, BEOL, More than Moore, Integration, Statistics
Nationell ämneskategori
Teknik och teknologier Nanoteknik
Identifikatorer
urn:nbn:se:kth:diva-188134 (URN)978-91-7729-024-7 (ISBN)
Disputation
2016-08-26, Sal C, Isafjordsgatan 22, Electrum 229, 164-40, Kista, 10:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20160610

Tillgänglig från: 2016-06-10 Skapad: 2016-06-06 Senast uppdaterad: 2022-10-24Bibliografiskt granskad

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Smith, Anderson D.Niklaus, FrankVaziri, SamFischer, Andreas C.Sterner, MikaelForsberg, FredrikSchröder, StephanÖstling, MikaelLemme, Max C.

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Smith, Anderson D.Niklaus, FrankVaziri, SamFischer, Andreas C.Sterner, MikaelForsberg, FredrikSchröder, StephanÖstling, MikaelLemme, Max C.
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Integrerade komponenter och kretsarMikro- och nanosystemteknik
Annan elektroteknik och elektronik

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