Challenges and trends in magnetic sensor integration with microfluidics for biomedical applications

…, DC Leitao, TM Dias, J Valadeiro… - Journal of Physics D …, 2017 - iopscience.iop.org
Magnetoresistive (MR) sensors have been successfully applied in many technologies, in
particular readout electronics and smart systems for multiple signal addressing and readout. …

Linearization strategies for high sensitivity magnetoresistive sensors

AV Silva, DC Leitao, J Valadeiro, J Amaral… - The European Physical …, 2015 - epjap.org
Ultrasensitive magnetic field sensors envisaged for applications on biomedical imaging
require the detection of low-intensity and low-frequency signals. Therefore linear magnetic …

[HTML][HTML] Hybrid integration of magnetoresistive sensors with MEMS as a strategy to detect ultra-low magnetic fields

J Valadeiro, S Cardoso, R Macedo, A Guedes… - Micromachines, 2016 - mdpi.com
… Joćo Valadeiro would like to thank Diana C. Leitao for her … microfabricated the MEMS and
Joćo Valadeiro, Rita Macedo and … Joćo Valadeiro wrote the paper with contributions from all …

[PDF][PDF] In vivo magnetic recording of neuronal activity

L Caruso, T Wunderle, CM Lewis, J Valadeiro… - Neuron, 2017 - cell.com
Neuronal activity generates ionic flows and thereby both magnetic fields and electric potential
differences, ie, voltages. Voltage measurements are widely used but suffer from isolating …

Strategies for pTesla field detection using magnetoresistive sensors with a soft pinned sensing layer

JP Valadeiro, J Amaral, DC Leitao… - IEEE transactions on …, 2015 - ieeexplore.ieee.org
The detection of low-intensity and low-frequency signals requires magnetic sensors with
enhanced sensitivity, low noise levels, and improved field detection at low operating frequencies…

Synchronous declines of wintering waders and high-tide roost area in a temperate estuary: Results of a 10-year monitoring programme

…, J Jara, A Almeida, F Morais, C Silva, J Valadeiro… - Waterbirds, 2023 - BioOne
. Migratory wader populations are declining across all major flyways, mostly due to habitat
loss and human disturbance. Portuguese wetlands act as key wintering and stop-over sites for …

Improved efficiency of tapered magnetic flux concentrators with double-layer architecture

J Valadeiro, DC Leitao, S Cardoso… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
Being able to increase the sensitivity of magnetoresistive sensors, by orders of magnitude,
provides a route toward challenging detection levels, and opens the way for new applications. …

Flexible magnetoresistive sensors designed for conformal integration

…, E Paz, M Martins, J Valadeiro… - IEEE Transactions …, 2016 - ieeexplore.ieee.org
J. Valadeiro acknowledges FCT for scholarship grant PD/BD/113956/2015 within the …
Valadeiro et al., “Bending effect on magnetoresistive silicon probes,” IEEE Trans. Magn., vol…

Microneedles with integrated magnetoresistive sensors: A precision tool in biomedical instrumentation

J Valadeiro, M Silva, S Cardoso… - 2017 IEEE Sensors …, 2017 - ieeexplore.ieee.org
This work describes how needle shape silicon probes with integrated magnetoresistive
sensing elements can be used in neurosciences. The fabricated probes allow simultaneous …

Bending effect on magnetoresistive silicon probes

J Valadeiro, J Amaral, DC Leitao… - IEEE Transactions …, 2015 - ieeexplore.ieee.org
In vivo experiments to detect the neuronal magnetic field require high-sensitivity magnetoresistive
sensors incorporated in micromachined silicon probes that do not damage the organic …