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Development of Multifunctional E-Skin Sensors.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Development of Multifunctional E-Skin Sensors./
Author:	dos Santos, Andreia Sofia Santana.
Description:	1 online resource (429 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-01, Section: B.
Contained By:	Dissertations Abstracts International84-01B.
Subject:	Restless legs syndrome. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29137711click for full text (PQDT)
ISBN:	9798835521296

Development of Multifunctional E-Skin Sensors.
dos Santos, Andreia Sofia Santana.

Development of Multifunctional E-Skin Sensors. - 1 online resource (429 pages)

Source: Dissertations Abstracts International, Volume: 84-01, Section: B.

Thesis (Ph.D.)--Universidade NOVA de Lisboa (Portugal), 2020.

Includes bibliographical references

Electronic skin (e-skin) is a hot topic due to its enormous potential for health monitoring, functional prosthesis, robotics, and human-machine-interfaces (HMI). For these applications, pressure and temperature sensors and energy harvesters are essential. Their performance may be tuned by their films micro-structuring, either through expensive and time-consuming photolithography techniques or low-cost yet low-tunability approaches. This PhD thesis aimed to introduce and explore a new micro-structuring technique to the field of e-skin - laser engraving - to produce multifunctional e-skin devices able to sense pressure and temperature while being self-powered. This technique was employed to produce moulds for soft lithography, in a low-cost, fast, and highly customizable way. Several parameters of the technique were studied to evaluate their impact in the performance of the devices, such as moulds materials, laser power and speed, and design variables. Amongst the piezoresistive sensors produced, sensors suitable for blood pressure wave detection at the wrist [sensitivity of - 3.2 kPa-1 below 119 Pa, limit of detection (LOD) of 15 Pa], general health monitoring (sensitivity of 4.5 kPa-1 below 10 kPa, relaxation time of 1.4 ms, micro-structured film thickness of only 133 µm), and robotics and functional prosthesis (sensitivity of - 6.4 x 10-3 kPa-1 between 1.2 kPa and 100 kPa, stable output over 27 500 cycles) were obtained. Temperature sensors with micro-cones were achieved with a temperature coefficient of resistance (TCR) of 2.3 %/°C. Energy harvesters based on micro-structured composites of polydimethylsiloxane (PDMS) and zinc tin oxide (ZnSnO3) nanowires (NWs; 120 V and 13 µA at > 100 N) or zinc oxide (ZnO) nanorods (NRs; 6 V at 2.3 N) were produced as well. The work described herein unveils the tremendous potential of the laser engraving technique to produce different e-skin devices with adjustable performance to suit distinct applications, with a high benefit/cost ratio.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798835521296Subjects--Topical Terms:

1364286
Restless legs syndrome.
Index Terms--Genre/Form:

542853
Electronic books.

Development of Multifunctional E-Skin Sensors.
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100 1 $a dos Santos, Andreia Sofia Santana. $3 3699450
245 1 0 $a Development of Multifunctional E-Skin Sensors.
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300 $a 1 online resource (429 pages)
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500 $a Source: Dissertations Abstracts International, Volume: 84-01, Section: B.
500 $a Advisor: do Nascimento, Rui Alberto Garcao Barreira; Aguas, Hugo Manuel Brito.
502 $a Thesis (Ph.D.)--Universidade NOVA de Lisboa (Portugal), 2020.
504 $a Includes bibliographical references
520 $a Electronic skin (e-skin) is a hot topic due to its enormous potential for health monitoring, functional prosthesis, robotics, and human-machine-interfaces (HMI). For these applications, pressure and temperature sensors and energy harvesters are essential. Their performance may be tuned by their films micro-structuring, either through expensive and time-consuming photolithography techniques or low-cost yet low-tunability approaches. This PhD thesis aimed to introduce and explore a new micro-structuring technique to the field of e-skin - laser engraving - to produce multifunctional e-skin devices able to sense pressure and temperature while being self-powered. This technique was employed to produce moulds for soft lithography, in a low-cost, fast, and highly customizable way. Several parameters of the technique were studied to evaluate their impact in the performance of the devices, such as moulds materials, laser power and speed, and design variables. Amongst the piezoresistive sensors produced, sensors suitable for blood pressure wave detection at the wrist [sensitivity of - 3.2 kPa-1 below 119 Pa, limit of detection (LOD) of 15 Pa], general health monitoring (sensitivity of 4.5 kPa-1 below 10 kPa, relaxation time of 1.4 ms, micro-structured film thickness of only 133 µm), and robotics and functional prosthesis (sensitivity of - 6.4 x 10-3 kPa-1 between 1.2 kPa and 100 kPa, stable output over 27 500 cycles) were obtained. Temperature sensors with micro-cones were achieved with a temperature coefficient of resistance (TCR) of 2.3 %/°C. Energy harvesters based on micro-structured composites of polydimethylsiloxane (PDMS) and zinc tin oxide (ZnSnO3) nanowires (NWs; 120 V and 13 µA at > 100 N) or zinc oxide (ZnO) nanorods (NRs; 6 V at 2.3 N) were produced as well. The work described herein unveils the tremendous potential of the laser engraving technique to produce different e-skin devices with adjustable performance to suit distinct applications, with a high benefit/cost ratio.
520 $a A pele eletronica (e-skin) e um topico popular devido a sua potencialidade para monitorizacao de saude, proteses funcionais, robotica, e interfaces homem-maquina (HMI). Nestas aplicacoes, sensores de pressao e temperatura e geradores de energia sao essenciais, cujo desempenho e ajustavel pela micro-estruturacao dos seus filmes atraves de tecnicas dispendiosas e demoradas de fotolitografia, ou abordagens economicas, porem de fraca customizacao. Esta tese de doutoramento pretendeu introduzir e explorar uma tecnica nova de micro-estruturacao na area de e-skin - gravacao a laser - para produzir dispositivos multifuncionais auto-suficientes, capazes de detetar pressao e temperatura. Empregou-se esta tecnica na producao de moldes para litografia macia, de forma rapida, a baixo custo, e altamente customizavel. Estudaram-se varios parametros desta tecnica para avaliar o seu impacto no desempenho dos dispositivos, nomeadamente materiais dos moldes, potencia e velocidade do laser, e variaveis de design. Obtiveram-se sensores piezoresistivos adequados a detecao da onda de pressao no pulso [sensibilidade de - 3.2 kPa-1 ate 119 Pa, limite de detecao (LOD) de 15 Pa], monitorizacao de saude (sensibilidade de 4.5 kPa-1 ate 10 kPa, tempo de relaxacao de 1.4 ms, filme microestruturado de apenas 133 µm de espessura), e robotica e proteses funcionais (sensibilidade de - 6.4 x 10-3 kPa-1 entre 1.2 kPa e 100 kPa, resposta estavel durante 27 500 ciclos). Produziram-se sensores de temperatura com micro-cones com um coeficiente de temperatura de resistencia (TCR) de 2.3 %/°C. Obtiveram-se igualmente geradores de energia baseados em compositos micro-estruturados de polidimetilsiloxano (PDMS) e nano-fios (NWs) de oxido de zinco e estanho (ZnSnO3; 120 V e 13 µA acima de 100 N) ou nano-bastonetes (NRs) de oxido de zinco (ZnO; 6 V a 2.3 N). Este trabalho desvenda o enorme potencial da tecnica de gravacao por laser para produzir diferentes dispositivos e-skin com desempenhos ajustaveis a cada aplicacao, com um elevado racio de beneficio/custo.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Restless legs syndrome. $3 1364286
650 4 $a Prostheses. $3 3683608
650 4 $a Lasers. $3 535503
650 4 $a Blood pressure. $3 661055
650 4 $a Carbon. $3 604057
650 4 $a Optimization. $3 891104
650 4 $a Sensors. $3 3549539
650 4 $a Zinc oxides. $3 3681737
650 4 $a Electrocardiography. $3 773588
650 4 $a Design. $3 518875
650 4 $a Energy. $3 876794
650 4 $a Walking. $3 548733
650 4 $a Respiration. $3 610890
650 4 $a Morphology. $3 591167
650 4 $a Scanning electron microscopy. $3 551366
650 4 $a Robotics. $3 519753
650 4 $a Engraving. $3 3688218
650 4 $a Analytical chemistry. $3 3168300
650 4 $a Biology. $3 522710
650 4 $a Chemistry. $3 516420
650 4 $a Optics. $3 517925
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0287
690 $a 0771
690 $a 0791
690 $a 0389
690 $a 0486
690 $a 0306
690 $a 0485
690 $a 0752
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Universidade NOVA de Lisboa (Portugal). $3 3427984
773 0 $t Dissertations Abstracts International $g 84-01B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29137711 $z click for full text (PQDT)