Publicação
Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators
| Resumo: | The urgent global demand for sustainable, decentralized, and reliable energy solutions has fuelled research into nanotechnology-based energy harvesting. This thesis advances both the fundamental understanding of triboelectrification and the development of multifunctional nanogenerators - triboelectric (TENGs) and piezoelectric (PENGs) - with the objective of enabling next-generation self-powered smart applications. To establish the foundation, a comprehensive analysis of the triboelectric effect - particularly under dirt-prone environments - was conducted alongside the role of functional materials for environmental energy harvesting and smart sensing. Charge-transport mechanisms, device architectures, and stimuli-responsive systems were examined, highlighting durability, contamination, and variability challenges, and providing the conceptual framework for smart TENGs applications developed in this thesis. Systematic investigations of liquid-solid triboelectrification revealed how flow dynamics, device structure, and ionic content govern electrical output. To translate TENGs into self-powered pressure sensors, a hierarchical surface-engineering strategy enhanced output and introduced self-cleaning capability for durable e-skin. Dual-scale micro/nanostructuring with chemical modification produced hydrophobic surfaces, achieving superior energy harvesting (~270 mW·m-2), high-pressure sensitivity, and 94% contaminant removal. Toward sustainable electronics, laser-induced graphene (LIG) electrodes were developed for food-quality monitoring and integrated with self-powered barcodes via TENGs. Anthocyanin incorporation catalyzed graphene synthesis (ID/IG = 0.87) and conferred NH3 responsiveness, enabling tri-modal detection-colorimetric, electrochemical, and RFID-with a 110 ppm detection limit and 1.2 Ω·m3·mg-1 sensitivity, thereby allowing real-time, wireless, and reagent-free freshness monitoring. In the biomedical domain, PENGs and mechanically triggered electric fields developed stimuli-responsive gyroid scaffolds with NaNbO3 nanostructures for bone regeneration. Combining hierarchical porosity with ultrasound stimulation, these scaffolds enhanced cell proliferation, alignment, and mineralization, achieving >1200 % calcium deposition and establishing bioelectric scaffolds as transformative for regenerative therapies. Collectively, this thesis demonstrates how multifunctional nanogenerators, grounded in fundamental mechanisms, can be engineered as a sustainable and versatile nexus for self-powered sensors in healthcare, agriculture, smart packaging, and pressure-sensing applications. |
|---|---|
| Autores principais: | Silva, Rafael Resende Assis |
| Assunto: | Nanotechnology Triboelectric nanogenerators Piezoelectric nanogenerators Energy harvesting Polymers Self-powered sensors |
| Ano: | 2025 |
| País: | Portugal |
| Tipo de documento: | tese de doutoramento |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| _version_ | 1879446022465257472 |
|---|---|
| author | Silva, Rafael Resende Assis |
| author_facet | Silva, Rafael Resende Assis |
| author_role | author |
| contributor_name_str_mv | Martins, Rodrigo Mattoso, Luiz RUN |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Silva, Rafael Resende Assis\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Martins, Rodrigo Mattoso, Luiz RUN |
| datacite.creators.creator.creatorName.fl_str_mv | Silva, Rafael Resende Assis |
| datacite.date.Accepted.fl_str_mv | 2025-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2026-05-26T09:56:30Z |
| datacite.date.embargoed.fl_str_mv | 2026-05-26T09:56:30Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Nanotechnology Triboelectric nanogenerators Piezoelectric nanogenerators Energy harvesting Polymers Self-powered sensors |
| datacite.titles.title.fl_str_mv | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| dc.contributor.none.fl_str_mv | Martins, Rodrigo Mattoso, Luiz RUN |
| dc.creator.none.fl_str_mv | Silva, Rafael Resende Assis |
| dc.date.Accepted.fl_str_mv | 2025-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2026-05-26T09:56:30Z |
| dc.date.embargoed.fl_str_mv | 2026-05-26T09:56:30Z |
| dc.description.none.fl_str_mv | A crescente demanda global por soluções energéticas sustentáveis, descentralizadas e confiáveis tem impulsionado pesquisas em colheita de energia baseada em nanotecnologia. Esta tese aprofunda a compreensão da triboeletrificação e o desenvolvimento de nanogeradores multifuncionais, triboelétricos (TENGs) e piezoelétricos (PENGs), voltados a aplicações inteligentes e autônomas. Foi realizada uma análise abrangente do efeito triboelétrico, especialmente em ambientes sujeitos à contaminação, juntamente com o papel de materiais funcionais na colheita de energia ambiental e em sistemas de detecção inteligente. Mecanismos de transporte de carga, arquiteturas de dispositivos e sistemas responsivos a estímulos foram investigados, destacando desafios e estabelecendo o arcabouço conceitual das aplicações desenvolvidas. Estudos da triboeletrificação líquido-sólido revelaram como a dinâmica do fluxo, a estrutura e o conteúdo iônico governam a geração elétrica. Para converter TENGs em sensores de pressão autônomos, uma estratégia hierárquica de engenharia de superfície aumentou o desempenho e introduziu autolimpeza em e-skins duráveis. A micro/nanoestruturação e modificação química produziram superfícies hidrofóbicas, alcançando alta colheita de energia (~270 mW·m-2), sensibilidade e de remoção de contaminantes (94 %). Eletrodos de grafeno induzido a laser (LIG) foram desenvolvidos para monitoramento da qualidade de alimentos e integrados a códigos de barras autoalimentados. A incorporação de antocianinas catalisou a síntese do grafeno (ID/IG: 0,87) e conferiu responsividade a NH3, permitindo detecção trimodal, colorimétrica, eletroquímica e RFID, com limite de 110 ppm e sensibilidade de 1,2 Ω·m3·mg-1, possibilitando monitoramento sem fio e em tempo real. No campo biomédico, PENGs e campos elétricos induzidos mecanicamente geraram scaffolds giroides com nanostruturas de NaNbO3 para regeneração óssea. A combinação de porosidade hierárquica e estimulação ultrassônica aprimorou proliferação, alinhamento e mineralização celular, atingindo aumento >1200 % na deposição de cálcio. Assim, esta tese demonstra como nanogeradores multifuncionais, fundamentados em princípios básicos, podem formar um elo sustentável-versátil para sensores autoalimentados em saúde, agricultura, embalagens inteligentes e interfaces robóticas. |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10362/203411 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.cclincense.fl_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Nanotechnology Triboelectric nanogenerators Piezoelectric nanogenerators Energy harvesting Polymers Self-powered sensors |
| dc.title.fl_str_mv | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_db06 |
| description | The urgent global demand for sustainable, decentralized, and reliable energy solutions has fuelled research into nanotechnology-based energy harvesting. This thesis advances both the fundamental understanding of triboelectrification and the development of multifunctional nanogenerators - triboelectric (TENGs) and piezoelectric (PENGs) - with the objective of enabling next-generation self-powered smart applications. To establish the foundation, a comprehensive analysis of the triboelectric effect - particularly under dirt-prone environments - was conducted alongside the role of functional materials for environmental energy harvesting and smart sensing. Charge-transport mechanisms, device architectures, and stimuli-responsive systems were examined, highlighting durability, contamination, and variability challenges, and providing the conceptual framework for smart TENGs applications developed in this thesis. Systematic investigations of liquid-solid triboelectrification revealed how flow dynamics, device structure, and ionic content govern electrical output. To translate TENGs into self-powered pressure sensors, a hierarchical surface-engineering strategy enhanced output and introduced self-cleaning capability for durable e-skin. Dual-scale micro/nanostructuring with chemical modification produced hydrophobic surfaces, achieving superior energy harvesting (~270 mW·m-2), high-pressure sensitivity, and 94% contaminant removal. Toward sustainable electronics, laser-induced graphene (LIG) electrodes were developed for food-quality monitoring and integrated with self-powered barcodes via TENGs. Anthocyanin incorporation catalyzed graphene synthesis (ID/IG = 0.87) and conferred NH3 responsiveness, enabling tri-modal detection-colorimetric, electrochemical, and RFID-with a 110 ppm detection limit and 1.2 Ω·m3·mg-1 sensitivity, thereby allowing real-time, wireless, and reagent-free freshness monitoring. In the biomedical domain, PENGs and mechanically triggered electric fields developed stimuli-responsive gyroid scaffolds with NaNbO3 nanostructures for bone regeneration. Combining hierarchical porosity with ultrasound stimulation, these scaffolds enhanced cell proliferation, alignment, and mineralization, achieving >1200 % calcium deposition and establishing bioelectric scaffolds as transformative for regenerative therapies. Collectively, this thesis demonstrates how multifunctional nanogenerators, grounded in fundamental mechanisms, can be engineered as a sustainable and versatile nexus for self-powered sensors in healthcare, agriculture, smart packaging, and pressure-sensing applications. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | doctoralThesis |
| fulltext.url.fl_str_mv | https://run.unl.pt/bitstreams/314f6632-afbd-481a-9e25-ff05d0ed93c3/download |
| id | run_da577a1a02eb7149cc248a7033cca0e7 |
| identifier.url.fl_str_mv | http://hdl.handle.net/10362/203411 |
| inst_facet_str | urn:organizationAcronym:unl{{{_:::_}}}Universidade Nova de Lisboa |
| instacron_str | unl |
| institution | Universidade Nova de Lisboa |
| instname_str | Universidade Nova de Lisboa |
| language | eng |
| network_acronym_str | run |
| network_name_str | Repositório Institucional da UNL |
| oai_identifier_str | oai:run.unl.pt:10362/203411 |
| organization_str_mv | urn:organizationAcronym:unl |
| person_str_mv | Silva, Rafael Resende Assis |
| publishDate | 2025 |
| repo_facet_str | urn:repositoryAcronym:run{{{_:::_}}}Repositório Institucional da UNL |
| reponame_str | Repositório Institucional da UNL |
| repository_id_str | urn:repositoryAcronym:run |
| service_str_mv | urn:repositoryAcronym:run |
| spelling | engengThe urgent global demand for sustainable, decentralized, and reliable energy solutions has fuelled research into nanotechnology-based energy harvesting. This thesis advances both the fundamental understanding of triboelectrification and the development of multifunctional nanogenerators - triboelectric (TENGs) and piezoelectric (PENGs) - with the objective of enabling next-generation self-powered smart applications. To establish the foundation, a comprehensive analysis of the triboelectric effect - particularly under dirt-prone environments - was conducted alongside the role of functional materials for environmental energy harvesting and smart sensing. Charge-transport mechanisms, device architectures, and stimuli-responsive systems were examined, highlighting durability, contamination, and variability challenges, and providing the conceptual framework for smart TENGs applications developed in this thesis. Systematic investigations of liquid-solid triboelectrification revealed how flow dynamics, device structure, and ionic content govern electrical output. To translate TENGs into self-powered pressure sensors, a hierarchical surface-engineering strategy enhanced output and introduced self-cleaning capability for durable e-skin. Dual-scale micro/nanostructuring with chemical modification produced hydrophobic surfaces, achieving superior energy harvesting (~270 mW·m-2), high-pressure sensitivity, and 94% contaminant removal. Toward sustainable electronics, laser-induced graphene (LIG) electrodes were developed for food-quality monitoring and integrated with self-powered barcodes via TENGs. Anthocyanin incorporation catalyzed graphene synthesis (ID/IG = 0.87) and conferred NH3 responsiveness, enabling tri-modal detection-colorimetric, electrochemical, and RFID-with a 110 ppm detection limit and 1.2 Ω·m3·mg-1 sensitivity, thereby allowing real-time, wireless, and reagent-free freshness monitoring. In the biomedical domain, PENGs and mechanically triggered electric fields developed stimuli-responsive gyroid scaffolds with NaNbO3 nanostructures for bone regeneration. Combining hierarchical porosity with ultrasound stimulation, these scaffolds enhanced cell proliferation, alignment, and mineralization, achieving >1200 % calcium deposition and establishing bioelectric scaffolds as transformative for regenerative therapies. Collectively, this thesis demonstrates how multifunctional nanogenerators, grounded in fundamental mechanisms, can be engineered as a sustainable and versatile nexus for self-powered sensors in healthcare, agriculture, smart packaging, and pressure-sensing applications.porA crescente demanda global por soluções energéticas sustentáveis, descentralizadas e confiáveis tem impulsionado pesquisas em colheita de energia baseada em nanotecnologia. Esta tese aprofunda a compreensão da triboeletrificação e o desenvolvimento de nanogeradores multifuncionais, triboelétricos (TENGs) e piezoelétricos (PENGs), voltados a aplicações inteligentes e autônomas. Foi realizada uma análise abrangente do efeito triboelétrico, especialmente em ambientes sujeitos à contaminação, juntamente com o papel de materiais funcionais na colheita de energia ambiental e em sistemas de detecção inteligente. Mecanismos de transporte de carga, arquiteturas de dispositivos e sistemas responsivos a estímulos foram investigados, destacando desafios e estabelecendo o arcabouço conceitual das aplicações desenvolvidas. Estudos da triboeletrificação líquido-sólido revelaram como a dinâmica do fluxo, a estrutura e o conteúdo iônico governam a geração elétrica. Para converter TENGs em sensores de pressão autônomos, uma estratégia hierárquica de engenharia de superfície aumentou o desempenho e introduziu autolimpeza em e-skins duráveis. A micro/nanoestruturação e modificação química produziram superfícies hidrofóbicas, alcançando alta colheita de energia (~270 mW·m-2), sensibilidade e de remoção de contaminantes (94 %). Eletrodos de grafeno induzido a laser (LIG) foram desenvolvidos para monitoramento da qualidade de alimentos e integrados a códigos de barras autoalimentados. A incorporação de antocianinas catalisou a síntese do grafeno (ID/IG: 0,87) e conferiu responsividade a NH3, permitindo detecção trimodal, colorimétrica, eletroquímica e RFID, com limite de 110 ppm e sensibilidade de 1,2 Ω·m3·mg-1, possibilitando monitoramento sem fio e em tempo real. No campo biomédico, PENGs e campos elétricos induzidos mecanicamente geraram scaffolds giroides com nanostruturas de NaNbO3 para regeneração óssea. A combinação de porosidade hierárquica e estimulação ultrassônica aprimorou proliferação, alinhamento e mineralização celular, atingindo aumento >1200 % na deposição de cálcio. Assim, esta tese demonstra como nanogeradores multifuncionais, fundamentados em princípios básicos, podem formar um elo sustentável-versátil para sensores autoalimentados em saúde, agricultura, embalagens inteligentes e interfaces robóticas.application/pdfengNanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric NanogeneratorsSilva, Rafael Resende AssisMartins, RodrigoMattoso, LuizHostingInstitutionOrganizationalRUNe-mailmailto:run@unl.ptrun@unl.pt2026-05-26T09:56:30Z20252025-01-01T00:00:00ZHandlehttp://hdl.handle.net/10362/203411http://purl.org/coar/access_right/c_abf2open accessNanotechnologyTriboelectric nanogeneratorsPiezoelectric nanogeneratorsEnergy harvestingPolymersSelf-powered sensors28193516 bytesliteraturehttp://purl.org/coar/resource_type/c_db06doctoral thesis2025http://creativecommons.org/licenses/by/4.0/http://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://run.unl.pt/bitstreams/314f6632-afbd-481a-9e25-ff05d0ed93c3/download |
| spellingShingle | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators Silva, Rafael Resende Assis Nanotechnology Triboelectric nanogenerators Piezoelectric nanogenerators Energy harvesting Polymers Self-powered sensors |
| status | SINGLETON |
| subject.fl_str_mv | Nanotechnology Triboelectric nanogenerators Piezoelectric nanogenerators Energy harvesting Polymers Self-powered sensors |
| title | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| title_full | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| title_fullStr | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| title_full_unstemmed | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| title_short | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| title_sort | Nanotechnology for Energy Harvesting: From Fundamental Triboelectrification to Self-Powered Smart Applications via Triboelectric and Piezoelectric Nanogenerators |
| topic | Nanotechnology Triboelectric nanogenerators Piezoelectric nanogenerators Energy harvesting Polymers Self-powered sensors |
| topic_facet | Nanotechnology Triboelectric nanogenerators Piezoelectric nanogenerators Energy harvesting Polymers Self-powered sensors |
| url | http://hdl.handle.net/10362/203411 |
| visible | 1 |
Atividades financiadas
Não foram encontrados projetos financiados.