東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Dimensionality Reduction of 2d Mater...

Da Costa, Mariana Caldeira Ferraz,

Linked to FindBook

Google Book

Amazon

博客來

Dimensionality Reduction of 2d Materials: Nanodevices and In-Situ Nanomechanical Analysis /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Dimensionality Reduction of 2d Materials: Nanodevices and In-Situ Nanomechanical Analysis // Mariana Caldeira Ferraz Da Costa.
Author:	Da Costa, Mariana Caldeira Ferraz,
Description:	1 electronic resource (177 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
Contained By:	Dissertations Abstracts International86-06B.
Subject:	Mechanical properties. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31777157
ISBN:	9798346776093

Dimensionality Reduction of 2d Materials: Nanodevices and In-Situ Nanomechanical Analysis /
Da Costa, Mariana Caldeira Ferraz,

Dimensionality Reduction of 2d Materials: Nanodevices and In-Situ Nanomechanical Analysis /Mariana Caldeira Ferraz Da Costa. - 1 electronic resource (177 pages)

Source: Dissertations Abstracts International, Volume: 86-06, Section: B.

The field of two-dimensional (2D) materials has evolved immensely in the last decades after the isolation of graphene in 2004. With superlative properties and atomic thickness, 2D materials are inherently soft and can undergo morphological changes, such as from nanosheets (2D) to one-dimensional (1D) nanoscrolls arrangements. Unlike multiwall carbon nanotubes (MWCNT), nanoscrolls possess non-concentric and open-ended topological structures with tuneable interlayer distance. These characteristics make nanoscrolls excellent candidates for applications that require relaxation or constriction on demand due to lattice expansion/retraction capability. This thesis is focused on the investigation of nanoscrolls formed under two different circumstances: (i) by means of chemical functionalization to obtain 2D electrolytes, and (ii) after rolling up mechanically exfoliated graphene nanosheets by solvent intercalation to form high quality and non-defective graphene nanoscrolls.Firstly, we show a theoretical approach sustained by research experiments to reveal how 2D electrolytes are formed and behave under different environmental conditions. Next, we demonstrate that a thermal annealing procedure can improve the mechanical and electrical properties of nanoscrolls. For this, we evaluate the electrical transport properties of devices and measured the mechanical properties of individual nanoscrolls using the PeakForce® quantitative nanomechanical (PF-QNM®) analysis mode in AFM. Improvements in the Young's modulus and decay of electrical resistance in graphitized samples are observed due to the superior structural rigidity and reduced number of defects/lower density of functional groups compared to the non-graphitized samples.Ultimately, we focus on investigating the electromechanical properties of high-quality and non-defective graphene nanoscrolls and mechanical properties of MWCNT. We observe such nanoscrolls behave differently from those based on 2D electrolytes in terms of the v physical properties response. We applied nanofabrication techniques to produce nanoscroll based devices and measure their electrical, mechanical and electromechanical properties. For this, we use an AFM tip to mechanically compress the nanoscrolls (mechanical properties) and simultaneously conduct real-time electrical transport measurements (electrical properties) using a 4-point probe system. We reveal an improved electron motion (decrease of electrical resistance) in the 1D current path due to densification of layers by the AFM tip during mechanical compression. We also compare the mechanical properties of graphene nanoscrolls with MWCNT and reveal that the physical properties of carbon-based nanomaterials with a 1D geometry depend on the quality, thickness, rolling up arrangement and presence of defects.We believe the functional behaviour of 2D electrolytes indicate they are versatile, adaptive and flexible solutions through materials that respond on demand with smart applications in mind. These materials can be applied in drug-delivery and energy storage systems, composite materials, filtration membranes, artificial tissues, etc. In addition, we believe our results contribute to the development of structural reinforcement or conductive fillers in composite materials, energy storage devices, thin film technologies. In particular, non defective graphene nanoscrolls are demonstrated as excellent candidates in nanoelectromechanical systems (NEMS), where increased sensitivity leads to smaller and more efficient sensors to detect stress, vibrations and forces at the atomic level.

English

ISBN: 9798346776093Subjects--Topical Terms:

3549505
Mechanical properties.

Dimensionality Reduction of 2d Materials: Nanodevices and In-Situ Nanomechanical Analysis /
LDR:04949nmm a22003973i 4500 001 2429435
005 20250430100828.5
006 m o d
007 cr|nu||||||||
008 261011s2023 miu||||||m |||||||eng d
020 $a 9798346776093
035 $a (MiAaPQD)AAI31777157
035 $a AAI31777157
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Da Costa, Mariana Caldeira Ferraz, $e author. $3 3817282
245 1 0 $a Dimensionality Reduction of 2d Materials: Nanodevices and In-Situ Nanomechanical Analysis / $c Mariana Caldeira Ferraz Da Costa.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 1 electronic resource (177 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
500 $a Advisors: Novoselov, Konstantin Sergeevich.
502 $b Ph.D. $c National University of Singapore (Singapore) $d 2023.
520 $a The field of two-dimensional (2D) materials has evolved immensely in the last decades after the isolation of graphene in 2004. With superlative properties and atomic thickness, 2D materials are inherently soft and can undergo morphological changes, such as from nanosheets (2D) to one-dimensional (1D) nanoscrolls arrangements. Unlike multiwall carbon nanotubes (MWCNT), nanoscrolls possess non-concentric and open-ended topological structures with tuneable interlayer distance. These characteristics make nanoscrolls excellent candidates for applications that require relaxation or constriction on demand due to lattice expansion/retraction capability. This thesis is focused on the investigation of nanoscrolls formed under two different circumstances: (i) by means of chemical functionalization to obtain 2D electrolytes, and (ii) after rolling up mechanically exfoliated graphene nanosheets by solvent intercalation to form high quality and non-defective graphene nanoscrolls.Firstly, we show a theoretical approach sustained by research experiments to reveal how 2D electrolytes are formed and behave under different environmental conditions. Next, we demonstrate that a thermal annealing procedure can improve the mechanical and electrical properties of nanoscrolls. For this, we evaluate the electrical transport properties of devices and measured the mechanical properties of individual nanoscrolls using the PeakForce® quantitative nanomechanical (PF-QNM®) analysis mode in AFM. Improvements in the Young's modulus and decay of electrical resistance in graphitized samples are observed due to the superior structural rigidity and reduced number of defects/lower density of functional groups compared to the non-graphitized samples.Ultimately, we focus on investigating the electromechanical properties of high-quality and non-defective graphene nanoscrolls and mechanical properties of MWCNT. We observe such nanoscrolls behave differently from those based on 2D electrolytes in terms of the v physical properties response. We applied nanofabrication techniques to produce nanoscroll based devices and measure their electrical, mechanical and electromechanical properties. For this, we use an AFM tip to mechanically compress the nanoscrolls (mechanical properties) and simultaneously conduct real-time electrical transport measurements (electrical properties) using a 4-point probe system. We reveal an improved electron motion (decrease of electrical resistance) in the 1D current path due to densification of layers by the AFM tip during mechanical compression. We also compare the mechanical properties of graphene nanoscrolls with MWCNT and reveal that the physical properties of carbon-based nanomaterials with a 1D geometry depend on the quality, thickness, rolling up arrangement and presence of defects.We believe the functional behaviour of 2D electrolytes indicate they are versatile, adaptive and flexible solutions through materials that respond on demand with smart applications in mind. These materials can be applied in drug-delivery and energy storage systems, composite materials, filtration membranes, artificial tissues, etc. In addition, we believe our results contribute to the development of structural reinforcement or conductive fillers in composite materials, energy storage devices, thin film technologies. In particular, non defective graphene nanoscrolls are demonstrated as excellent candidates in nanoelectromechanical systems (NEMS), where increased sensitivity leads to smaller and more efficient sensors to detect stress, vibrations and forces at the atomic level.
546 $a English
590 $a School code: 1883
650 4 $a Mechanical properties. $3 3549505
650 4 $a Boron. $3 544039
650 4 $a Sucrose. $3 2058928
650 4 $a Photographs. $3 627415
650 4 $a Graphite. $3 651851
650 4 $a Semiconductors. $3 516162
650 4 $a Energy storage. $3 652130
650 4 $a Graphene. $3 1569149
650 4 $a Thin films. $3 626403
650 4 $a Scanning electron microscopy. $3 551366
650 4 $a Composite materials. $3 654082
650 4 $a Crystal structure. $3 3561040
650 4 $a Electrolytes. $3 656992
650 4 $a Carbon. $3 604057
650 4 $a Molybdenum. $3 3681682
650 4 $a Electric properties. $3 3685580
650 4 $a Phase transitions. $3 3560387
650 4 $a Fullerenes. $3 714074
650 4 $a Deformation. $2 lcstt $3 3267001
650 4 $a Physical properties. $3 3564184
650 4 $a Analytical chemistry. $3 3168300
650 4 $a Condensed matter physics. $3 3173567
650 4 $a Energy. $3 876794
650 4 $a Materials science. $3 543314
650 4 $a Mechanics. $3 525881
690 $a 0486
690 $a 0611
690 $a 0791
690 $a 0794
690 $a 0346
710 2 $a National University of Singapore (Singapore). $e degree granting institution. $3 3765631
720 1 $a Novoselov, Konstantin Sergeevich $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-06B.
790 $a 1883
791 $a Ph.D.
792 $a 2023
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31777157