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Del Bosque A, Sánchez-Romate XF, Sánchez M, Ureña A. Toward flexible piezoresistive strain sensors based on polymer nanocomposites: a review on fundamentals, performance, and applications. NANOTECHNOLOGY 2024; 35:292003. [PMID: 38621367 DOI: 10.1088/1361-6528/ad3e87] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 04/15/2024] [Indexed: 04/17/2024]
Abstract
The fundamentals, performance, and applications of piezoresistive strain sensors based on polymer nanocomposites are summarized herein. The addition of conductive nanoparticles to a flexible polymer matrix has emerged as a possible alternative to conventional strain gauges, which have limitations in detecting small strain levels and adapting to different surfaces. The evaluation of the properties or performance parameters of strain sensors such as the elongation at break, sensitivity, linearity, hysteresis, transient response, stability, and durability are explained in this review. Moreover, these nanocomposites can be exposed to different environmental conditions throughout their lifetime, including different temperature, humidity or acidity/alkalinity levels, that can affect performance parameters. The development of flexible piezoresistive sensors based on nanocomposites has emerged in recent years for applications related to the biomedical field, smart robotics, and structural health monitoring. However, there are still challenges to overcome in designing high-performance flexible sensors for practical implementation. Overall, this paper provides a comprehensive overview of the current state of research on flexible piezoresistive strain sensors based on polymer nanocomposites, which can be a viable option to address some of the major technological challenges that the future holds.
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Affiliation(s)
- Antonio Del Bosque
- Technology, Instruction and Design in Engineering and Education Research Group (TiDEE.rg), Catholic University of Ávila, C/Canteros s/n, E-05005 Ávila, Spain
| | - Xoan F Sánchez-Romate
- Materials Science and Engineering Area, Higher School of Experimental Sciences and Technology, Rey Juan Carlos University, C/Tulipán s/n, Móstoles, E-28933 Madrid, Spain
| | - María Sánchez
- Materials Science and Engineering Area, Higher School of Experimental Sciences and Technology, Rey Juan Carlos University, C/Tulipán s/n, Móstoles, E-28933 Madrid, Spain
- Instituto de Tecnologías Para la Sostenibilidad, Rey Juan Carlos University, C/Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Alejandro Ureña
- Materials Science and Engineering Area, Higher School of Experimental Sciences and Technology, Rey Juan Carlos University, C/Tulipán s/n, Móstoles, E-28933 Madrid, Spain
- Instituto de Tecnologías Para la Sostenibilidad, Rey Juan Carlos University, C/Tulipán s/n, E-28933 Móstoles, Madrid, Spain
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Chermat R, Refet-Mollof E, Kamio Y, Carrier JF, Wong P, Gervais T. Brachytherapy on-a-chip: a clinically-relevant approach for radiotherapy testing in 3d biology. LAB ON A CHIP 2024; 24:2335-2346. [PMID: 38568477 DOI: 10.1039/d4lc00032c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
We describe the first microfluidic device for in vitro testing of brachytherapy (BT), with applications in translational cancer research. Our PDMS-made BT-on-chip system allows highly precise manual insertion of clinical BT seeds, reliable dose calculation using standard clinically-used TG-43 formalism and easy culture of naturally hypoxic spheroids in less than 3 days, thereby increasing the translational potential of the device. As the BT-on-chip platform is designed to be versatile, we showcase three different gold-standard post-irradiation bioassays and recapitulate, for the first time on-chip, key clinical observations such as dose rate effect and hypoxia-induced radioresistance. Our results suggest that BT-on-chip can be used to safely and efficiently integrate BT and radiotherapy to translational research and drug development pipelines, without expensive equipment or complex workflows.
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Affiliation(s)
- Rodin Chermat
- μFO Lab, Institute of Biomedical Engineering, Polytechnique Montréal, Montréal, Canada.
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
- Institut du Cancer de Montréal (ICM), Montréal, Canada
| | - Elena Refet-Mollof
- μFO Lab, Institute of Biomedical Engineering, Polytechnique Montréal, Montréal, Canada.
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
- Institut du Cancer de Montréal (ICM), Montréal, Canada
| | - Yuji Kamio
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
- Département de radio-oncologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, Canada
| | - Jean-François Carrier
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
- Institut du Cancer de Montréal (ICM), Montréal, Canada
- Département de radio-oncologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, Canada
- Département de Physique, Université de Montréal, Canada
| | - Philip Wong
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Thomas Gervais
- μFO Lab, Institute of Biomedical Engineering, Polytechnique Montréal, Montréal, Canada.
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Canada
- Institut du Cancer de Montréal (ICM), Montréal, Canada
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Burton A, Wang Z, Song D, Tran S, Hanna J, Ahmad D, Bakall J, Clausen D, Anderson J, Peralta R, Sandepudi K, Benedetto A, Yang E, Basrai D, Miller LE, Tresch MC, Gutruf P. Fully implanted battery-free high power platform for chronic spinal and muscular functional electrical stimulation. Nat Commun 2023; 14:7887. [PMID: 38036552 PMCID: PMC10689769 DOI: 10.1038/s41467-023-43669-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 11/16/2023] [Indexed: 12/02/2023] Open
Abstract
Electrical stimulation of the neuromuscular system holds promise for both scientific and therapeutic biomedical applications. Supplying and maintaining the power necessary to drive stimulation chronically is a fundamental challenge in these applications, especially when high voltages or currents are required. Wireless systems, in which energy is supplied through near field power transfer, could eliminate complications caused by battery packs or external connections, but currently do not provide the harvested power and voltages required for applications such as muscle stimulation. Here, we introduce a passive resonator optimized power transfer design that overcomes these limitations, enabling voltage compliances of ± 20 V and power over 300 mW at device volumes of 0.2 cm2, thereby improving power transfer 500% over previous systems. We show that this improved performance enables multichannel, biphasic, current-controlled operation at clinically relevant voltage and current ranges with digital control and telemetry in freely behaving animals. Preliminary chronic results indicate that implanted devices remain operational over 6 weeks in both intact and spinal cord injured rats and are capable of producing fine control of spinal and muscle stimulation.
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Affiliation(s)
- Alex Burton
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA
| | - Zhong Wang
- Department of Neuroscience, Northwestern University, Chicago, IL, 60611, USA
| | - Dan Song
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Sam Tran
- Department of Neuroscience, Northwestern University, Chicago, IL, 60611, USA
| | - Jessica Hanna
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA
| | - Dhrubo Ahmad
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA
| | - Jakob Bakall
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA
| | - David Clausen
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA
| | - Jerry Anderson
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA
| | - Roberto Peralta
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA
| | - Kirtana Sandepudi
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Alex Benedetto
- Interdepartmental Neuroscience, Northwestern University, Chicago, IL, 60611, USA
| | - Ethan Yang
- Department of Neuroscience, Northwestern University, Chicago, IL, 60611, USA
| | - Diya Basrai
- Department of Neuroscience, Northwestern University, Chicago, IL, 60611, USA
| | - Lee E Miller
- Department of Neuroscience, Northwestern University, Chicago, IL, 60611, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Interdepartmental Neuroscience, Northwestern University, Chicago, IL, 60611, USA
- Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, 60611, USA
| | - Matthew C Tresch
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, IL, 60611, USA.
- Shirley Ryan AbilityLab, Chicago, IL, 60611, USA.
| | - Philipp Gutruf
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ, 85721, USA.
- Bio5 Institute and Department of Neurology, University of Arizona, Tucson, AZ, 85721, USA.
- Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ, 85721, USA.
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Moore CP, Husson J, Boudaoud A, Amselem G, Baroud CN. Clogging of a Rectangular Slit by a Spherical Soft Particle. PHYSICAL REVIEW LETTERS 2023; 130:064001. [PMID: 36827557 DOI: 10.1103/physrevlett.130.064001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 01/03/2023] [Indexed: 06/18/2023]
Abstract
The capture of a soft spherical particle in a rectangular slit leads to a nonmonotonic pressure-flow rate relation at low Reynolds number. Simulations reveal that the flow induced deformations of the trapped particle focus the streamlines and pressure drop to a small region. This increases the resistance to flow by several orders of magnitude as the driving pressure is increased. As a result, two regimes are observed in experiments and simulations: a flow-dominated regime for small particle deformations, where flow rate increases with pressure, and an elastic-dominated regime in which solid deformations block the flow.
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Affiliation(s)
- Charles Paul Moore
- Institut Pasteur, Université Paris Cité, Physical microfluidics and Bioengineering, 25-28 Rue du Dr Roux, 75015 Paris, France
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Julien Husson
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Arezki Boudaoud
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Gabriel Amselem
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Charles N Baroud
- Institut Pasteur, Université Paris Cité, Physical microfluidics and Bioengineering, 25-28 Rue du Dr Roux, 75015 Paris, France
- Laboratoire d'Hydrodynamique (LadHyX), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
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Dhanabalan SS, Arun T, Periyasamy G, N D, N C, Avaninathan SR, Carrasco MF. Surface engineering of high-temperature PDMS substrate for flexible optoelectronic applications. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Chermat R, Ziaee M, Mak DY, Refet-Mollof E, Rodier F, Wong P, Carrier JF, Kamio Y, Gervais T. Radiotherapy on-chip: microfluidics for translational radiation oncology. LAB ON A CHIP 2022; 22:2065-2079. [PMID: 35477748 DOI: 10.1039/d2lc00177b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The clinical importance of radiotherapy in the treatment of cancer patients justifies the development and use of research tools at the fundamental, pre-clinical, and ultimately clinical levels, to investigate their toxicities and synergies with systemic agents on relevant biological samples. Although microfluidics has prompted a paradigm shift in drug discovery in the past two decades, it appears to have yet to translate to radiotherapy research. However, the materials, dimensions, design versatility and multiplexing capabilities of microfluidic devices make them well-suited to a variety of studies involving radiation physics, radiobiology and radiotherapy. This review will present the state-of-the-art applications of microfluidics in these fields and specifically highlight the perspectives offered by radiotherapy on-a-chip in the field of translational radiobiology and precision medicine. This body of knowledge can serve both the microfluidics and radiotherapy communities by identifying potential collaboration avenues to improve patient care.
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Affiliation(s)
- Rodin Chermat
- μFO Lab, Polytechnique Montréal, Montréal, QC, Canada.
- Institut du Cancer de Montréal, (ICM), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Maryam Ziaee
- μFO Lab, Polytechnique Montréal, Montréal, QC, Canada.
- Institut du Cancer de Montréal, (ICM), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - David Y Mak
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada
| | - Elena Refet-Mollof
- μFO Lab, Polytechnique Montréal, Montréal, QC, Canada.
- Institut du Cancer de Montréal, (ICM), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
| | - Francis Rodier
- Institut du Cancer de Montréal, (ICM), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Département de radiologie, radio-oncologie et médecine nucléaire, Université de Montréal, Montreal, QC, Canada
| | - Philip Wong
- Radiation Medicine Program, Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
- Institut du Cancer de Montréal, (ICM), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
- Department of Radiation Oncology, University of Toronto, Toronto, ON, Canada
| | - Jean-François Carrier
- Département de radiologie, radio-oncologie et médecine nucléaire, Université de Montréal, Montreal, QC, Canada
- Département de Physique, Université de Montréal, Montréal, QC, Canada
- Département de Radio-oncologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
| | - Yuji Kamio
- Département de Radio-oncologie, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, QC, Canada
- Département de Pharmacologie et Physiologie, Université de Montréal, Montreal, QC, Canada
| | - Thomas Gervais
- μFO Lab, Polytechnique Montréal, Montréal, QC, Canada.
- Institut du Cancer de Montréal, (ICM), Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada
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Novel Slippery Liquid-Infused Porous Surfaces (SLIPS) Based on Electrospun Polydimethylsiloxane/Polystyrene Fibrous Structures Infused with Natural Blackseed Oil. Int J Mol Sci 2022; 23:ijms23073682. [PMID: 35409042 PMCID: PMC8998331 DOI: 10.3390/ijms23073682] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/14/2022] [Accepted: 03/24/2022] [Indexed: 02/04/2023] Open
Abstract
Hydrophobic fibrous slippery liquid-infused porous surfaces (SLIPS) were fabricated by electrospinning polydimethylsiloxane (PDMS) and polystyrene (PS) as a carrier polymer on plasma-treated polyethylene (PE) and polyurethane (PU) substrates. Subsequent infusion of blackseed oil (BSO) into the porous structures was applied for the preparation of the SLIPS. SLIPS with infused lubricants can act as a repellency layer and play an important role in the prevention of biofilm formation. The effect of polymer solutions used in the electrospinning process was investigated to obtain well-defined hydrophobic fibrous structures. The surface properties were analyzed through various optical, macroscopic and spectroscopic techniques. A comprehensive investigation of the surface chemistry, surface morphology/topography, and mechanical properties was carried out on selected samples at optimized conditions. The electrospun fibers prepared using a mixture of PDMS/PS in the ratio of 1:1:10 (g/g/mL) using tetrahydrofuran (THF) solvent showed the best results in terms of fiber uniformity. The subsequent infusion of BSO into the fabricated PDMS/PS fiber mats exhibited slippery behavior regarding water droplets. Moreover, prepared SLIPS exhibited antibacterial activity against Staphylococcus aureus and Escherichia coli bacterium strains.
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Kamal I, Razak HRA, Abdul Karim MK, Mashohor S, Liew JYC, Low YJ, Zaaba NA, Norkhairunnisa M, Rafi NASM. Mechanical and Imaging Properties of a Clinical-Grade Kidney Phantom Based on Polydimethylsiloxane and Elastomer. Polymers (Basel) 2022; 14:polym14030535. [PMID: 35160523 PMCID: PMC8840541 DOI: 10.3390/polym14030535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 12/08/2021] [Accepted: 12/10/2021] [Indexed: 02/01/2023] Open
Abstract
Medical imaging phantoms are considered critical in mimicking the properties of human tissue for calibration, training, surgical planning, and simulation purposes. Hence, the stability and accuracy of the imaging phantom play a significant role in diagnostic imaging. This study aimed to evaluate the influence of hydrogen silicone (HS) and water (H2O) on the compression strength, radiation attenuation properties, and computed tomography (CT) number of the blended Polydimethylsiloxane (PDMS) samples, and to verify the best material to simulate kidney tissue. Four samples with different compositions were studied, including samples S1, S2, S3, and S4, which consisted of PDMS 100%, HS/PDMS 20:80, H2O/PDMS 20:80, and HS/H2O/PDMS 20:40:40, respectively. The stability of the samples was assessed using compression testing, and the attenuation properties of sample S2 were evaluated. The effective atomic number of S2 showed a similar pattern to the human kidney tissue at 1.50 × 10−1 to 1 MeV. With the use of a 120 kVp X-ray beam, the CT number quantified for S2, as well measured 40 HU, and had the highest contrast-to-noise ratio (CNR) value. Therefore, the S2 sample formulation exhibited the potential to mimic the human kidney, as it has a similar dynamic and is higher in terms of stability as a medical phantom.
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Affiliation(s)
- Izdihar Kamal
- Department of Medical Imaging, School of Health Sciences, KPJ Healthcare University College, Nilai 71800, Negeri Sembilan, Malaysia; (I.K.); (N.A.Z.); (N.A.S.M.R.)
- Department of Physics, Faculty of Science, University of Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (J.Y.C.L.); (Y.J.L.)
| | - Hairil Rashmizal Abdul Razak
- Department of Radiology, Faculty of Medicine and Health Sciences, University of Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
| | - Muhammad Khalis Abdul Karim
- Department of Physics, Faculty of Science, University of Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (J.Y.C.L.); (Y.J.L.)
- Correspondence: ; Tel.: +60-192140612
| | - Syamsiah Mashohor
- Department of Computer and Communication Systems, Faculty of Engineering, University of Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
| | - Josephine Ying Chyi Liew
- Department of Physics, Faculty of Science, University of Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (J.Y.C.L.); (Y.J.L.)
| | - Yiin Jian Low
- Department of Physics, Faculty of Science, University of Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia; (J.Y.C.L.); (Y.J.L.)
| | - Nur Atiqah Zaaba
- Department of Medical Imaging, School of Health Sciences, KPJ Healthcare University College, Nilai 71800, Negeri Sembilan, Malaysia; (I.K.); (N.A.Z.); (N.A.S.M.R.)
- Diagnostic Imaging Services, KPJ Seremban Specialist Hospital, Lot 6219&6220, Jalan Toman 1 Kemayan Square, Seremban 70200, Negeri Sembilan, Malaysia
| | - Mazlan Norkhairunnisa
- Institute of Advanced Technology, University of Putra Malaysia, Seri Kembangan 43400, Selangor, Malaysia;
| | - Nur Athirah Syima Mohd Rafi
- Department of Medical Imaging, School of Health Sciences, KPJ Healthcare University College, Nilai 71800, Negeri Sembilan, Malaysia; (I.K.); (N.A.Z.); (N.A.S.M.R.)
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Evaluation of radiation attenuation properties on a various composition of polydimethylsiloxane (PDMS) for fabrication of kidney phantom. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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