ETDs @PUC-Rio
| Título: | OPTICAL DETECTION OF HEAVY METAL IONS THROUGH SPR SPECTROMETRY WITH GOLD-GRAPHENE INTERFACES | ||||||||||||
| Autor: |
LUIS GONZALO BALDEON HUANQUI |
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| Colaborador(es): |
TOMMASO DEL ROSSO - Orientador |
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| Catalogação: | 04/JUL/2023 | Língua(s): | PORTUGUESE - BRAZIL |
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| Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
| Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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| Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=63103&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=63103&idi=2 |
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| DOI: | https://doi.org/10.17771/PUCRio.acad.63103 | ||||||||||||
| Resumo: | |||||||||||||
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Surface plásmon resonance (SPR) spectroscopy is an optical technique
based on the collective excitation of free electrons of noble metals, traditionally
used in sensing different types of analytes. In this work the fabrication process of
plásmonic sensors based on thin gold films and gold-graphene interfaces was
optimized. SPR sensing platforms were used for the detection of toxic heavy metals
ions Pb(2+), Hg(2+) and Cd(2+) in concentrations ranging from 0.1ppm to 1ppm. The
sensors based on gold-graphene interfaces, where graphene was grown using the
CVD method, demonstrated a sensitivity between 3 and 6 times greater than the
sensor made of thin films of gold, pointing to a chemical absorption due to the
transfer of electrons from the graphene to the ions.
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