SMART TAGS TO PH VARIATION MONITORING

João Victor Mendes; João Paulo Braga; Rafaela da Silveira Andre (PD); Lucas Fugikawa Santos

Todos os Trabalhos

Trabalho

Título do Trabalho

SMART TAGS TO PH VARIATION MONITORING

Autores

João Victor Mendes
João Paulo Braga
Rafaela da Silveira Andre (PD)
Lucas Fugikawa Santos

Modalidade

Pôster

Área temática

2) Intelligent Materials and Devices for Health, Security, Environment and Agriculture Applications

Data de Publicação

17/05/2024

País da Publicação

Brasil

Idioma da Publicação

Inglês

Página do Trabalho

https://www.even3.com.br/anais/workshop-do-ineo-2024/797045-smart-tags-to-ph-variation-monitoring

ISBN

978-65-272-0462-6

Palavras-Chave

NFC, pH monitoring, smart tags, RFID

Resumo

The near field communication (NFC) technology has become a worldwide tool for several things, such as wireless payment, business card and smart tags. The lack of contact necessity avoids several problems and allows applications on a huge variety of fields, for instance, on detector matters, it can be used to detect an alteration inside a sealed package, without violation. These smart tags can be created by the combination of commercial or laboratory made wireless tags and a sensing device, such as interdigital electrodes (IDEs) functionalized with polymers or metal oxides. At this work, IDEs were made by the lift-off process, using hydroxypropyl cellulose (HPC) as water soluble sacrificial material and RF-sputtering technique to deposit chromium (10 nm) and aluminium (100 nm). Then, those IDEs were functionalized with a drop casted organic polymer layer and integrated to commercial purchased wireless tags (max signal attenuation at 13,56 MHz). These smart tags were used to detect pH variation on a certain environment. In order to calibrate the wireless tag, acid solutions with different known pHs (2, 3, 4, 5 and 7) were used and measurements of impedance and reflection coefficient spectroscopy were performed. We were able to successfully correlate those different pHs to impedance and attenuation signals. Then, these smart tags were used as an embedded system with a smartphone with NFC tool to be able to detect a threshold of pH variation in an environment of interest without the necessity of laboratory equipment (e.g. reflection coefficient analyser), meaning that this device/technique can be used as a portable and low-cost pH monitor with several applications, such as fungi detection. Patent pending. (Authors acknowledge the financial support from CAPES, CNPq and FAPESP). [1] Rafaela S. Andre; Quynh P. Ngo; Lucas Fugikawa-Santos; Daniel S. Correa; Timothy M. Swager; (2021). Wireless Tags with Hybrid Nanomaterials for Volatile Amine Detection . ACS Sensors –. doi:10.1021/acssensors.1c00812

Título do Evento: Workshop do INEO 2024
Cidade do Evento: Nazaré Paulista
Título dos Anais do Evento: Anais do Workshop INEO 2024
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

MENDES, João Victor et al.. SMART TAGS TO PH VARIATION MONITORING.. In: Anais do Workshop INEO 2024. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2024. Disponível em: https//www.even3.com.br/anais/workshop-do-ineo-2024/797045-SMART-TAGS-TO-PH-VARIATION-MONITORING. Acesso em: 29/06/2025