8 research outputs found
Skin wound healing rate in fish depends on species and microbiota
The skin is a barrier between the body and the environment that protects the integrity of the body and houses a vast microbiota. By interacting with the host immune system, the microbiota improves wound healing in mammals. However, in fish, the evidence of the role of microbiota and the type of species on wound healing is scarce. We aimed to examine the wound healing rate in various fish species and evaluate the effect of antibiotics on the wound healing process. The wound healing rate was much faster in two of the seven fish species selected based on habitat and skin types. We also demonstrated that the composition of the microbiome plays a role in the wound healing rate. After antibiotic treatment, the wound healing rate improved in one species. Through 16S rRNA sequencing, we identified microbiome correlates of varying responses on wound healing after antibiotic treatment. These findings indicate that not only the species difference but also the microbiota play a significant role in wound healing in fish.1
Au-Based Biocompatible Capacitive Strain Sensor
Various strain sensors have been developed due to their capability to monitor a piece of basic physiological information. However, a lot of existing strain sensor is based on planar soft sensors, which have a few critical challenges such as structural mismatch and stable fixation on the target organ. Here, we present a 1-dimensional and biocompatible capacitive fiber strain sensor. The fiber strain sensor comprises a conductive fiber electrode based on Au, a representative biocompatible material. The structure of the fiber strain sensor is a double helix. The sensor shows high sensitivity of 9.8 and high stability. © 2023 IEEE
In Situ Formation of Ag Nanoparticles for Fiber Strain Sensors: Toward Textile-Based Wearable Applications
Wearable electronic devices have attracted significant attention as important components in several applications. Among various wearable electronic devices, interest in textile electronic devices is increasing because of their high deformability and portability in daily life. To develop textile electronic devices, fiber-based electronic devices should be fundamentally studied. Here, we report a stretchable and sensitive fiber strain sensor fabricated using only harmless materials during an in situ formation process. Despite using a mild and harmless reducing agent instead of typical strong and hazardous reducing agents, the developed fiber strain sensors feature a low initial electrical resistance of 0.9 ω/cm, a wide strain sensing range (220%), high sensitivity (∼5.8 × 104), negligible hysteresis, and high stability against repeated stretching-releasing deformation (5000 cycles). By applying the fiber sensors to various textiles, we demonstrate that the smart textile system can monitor various gestures in real-time and help users maintain accurate posture during exercise. These results will provide meaningful insights into the development of next-generation wearable applications. © 2021 American Chemical Society.FALS
Surface-Embedding of Mo Microparticles for Robust and Conductive Biodegradable Fiber Electrodes: Toward 1D Flexible Transient Electronics
Fiber-based implantable electronics are one of promising candidates for in vivo biomedical applications thanks to their unique structural advantages. However, development of fiber-based implantable electronic devices with biodegradable capability remains a challenge due to the lack of biodegradable fiber electrodes with high electrical and mechanical properties. Here, a biocompatible and biodegradable fiber electrode which simultaneously exhibits high electrical conductivity and mechanical robustness is presented. The fiber electrode is fabricated through a facile approach that incorporates a large amount of Mo microparticles into outermost volume of a biodegradable polycaprolactone (PCL) fiber scaffold in a concentrated manner. The biodegradable fiber electrode simultaneously exhibits a remarkable electrical performance (≈43.5 Ω cm−1), mechanical robustness, bending stability, and durability for more than 4000 bending cycles based on the Mo/PCL conductive layer and intact PCL core in the fiber electrode. The electrical behavior of the biodegradable fiber electrode under the bending deformation is analyzed by an analytical prediction and a numerical simulation. In addition, the biocompatible properties and degradation behavior of the fiber electrode are systematically investigated. The potential of biodegradable fiber electrode is demonstrated in various applications such as an interconnect, a suturable temperature sensor, and an in vivo electrical stimulator. © 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.TRU
Postoperative Long-Term Monitoring of Mechanical Characteristics in Reconstructed Soft Tissues Using Biocompatible, Immune-Tolerant, and Wireless Electronic Sutures
Accurate postoperative assessment of varying mechanical
properties
is crucial for customizing patient-specific treatments and optimizing
rehabilitation strategies following Achilles tendon (AT) rupture and
reconstruction surgery. This study introduces a wireless, chip-less,
and immune-tolerant in vivo strain-sensing suture designed to continuously
monitor mechanical stiffness variations in the reconstructed AT throughout
the healing process. This innovative sensing suture integrates a standard
medical suturing thread with a wireless fiber strain-sensing system,
which incorporates a fiber strain sensor and a double-layered inductive
coil for wireless readout. The winding design of Au nanoparticle-based
fiber electrodes and a hollow core contribute to the fiber strain
sensor’s high sensitivity (factor of 6.2 and 15.1 pF for revised
sensitivity), negligible hysteresis, and durability over 10,000 stretching
cycles. To ensure biocompatibility and immune tolerance during extended
in vivo periods, an antibiofouling lubricant layer was applied to
the sensing suture. Using this sensing system, we successfully monitored
the strain responses of the reconstructed AT in an in vivo porcine
model. This facilitated the postoperative assessment of mechanical
stiffness variations through a well-established analytical model during
the healing period
Postoperative Long-Term Monitoring of Mechanical Characteristics in Reconstructed Soft Tissues Using Biocompatible, Immune-Tolerant, and Wireless Electronic Sutures
Accurate postoperative assessment of varying mechanical
properties
is crucial for customizing patient-specific treatments and optimizing
rehabilitation strategies following Achilles tendon (AT) rupture and
reconstruction surgery. This study introduces a wireless, chip-less,
and immune-tolerant in vivo strain-sensing suture designed to continuously
monitor mechanical stiffness variations in the reconstructed AT throughout
the healing process. This innovative sensing suture integrates a standard
medical suturing thread with a wireless fiber strain-sensing system,
which incorporates a fiber strain sensor and a double-layered inductive
coil for wireless readout. The winding design of Au nanoparticle-based
fiber electrodes and a hollow core contribute to the fiber strain
sensor’s high sensitivity (factor of 6.2 and 15.1 pF for revised
sensitivity), negligible hysteresis, and durability over 10,000 stretching
cycles. To ensure biocompatibility and immune tolerance during extended
in vivo periods, an antibiofouling lubricant layer was applied to
the sensing suture. Using this sensing system, we successfully monitored
the strain responses of the reconstructed AT in an in vivo porcine
model. This facilitated the postoperative assessment of mechanical
stiffness variations through a well-established analytical model during
the healing period
Postoperative Long-Term Monitoring of Mechanical Characteristics in Reconstructed Soft Tissues Using Biocompatible, Immune-Tolerant, and Wireless Electronic Sutures
Accurate postoperative assessment of varying mechanical
properties
is crucial for customizing patient-specific treatments and optimizing
rehabilitation strategies following Achilles tendon (AT) rupture and
reconstruction surgery. This study introduces a wireless, chip-less,
and immune-tolerant in vivo strain-sensing suture designed to continuously
monitor mechanical stiffness variations in the reconstructed AT throughout
the healing process. This innovative sensing suture integrates a standard
medical suturing thread with a wireless fiber strain-sensing system,
which incorporates a fiber strain sensor and a double-layered inductive
coil for wireless readout. The winding design of Au nanoparticle-based
fiber electrodes and a hollow core contribute to the fiber strain
sensor’s high sensitivity (factor of 6.2 and 15.1 pF for revised
sensitivity), negligible hysteresis, and durability over 10,000 stretching
cycles. To ensure biocompatibility and immune tolerance during extended
in vivo periods, an antibiofouling lubricant layer was applied to
the sensing suture. Using this sensing system, we successfully monitored
the strain responses of the reconstructed AT in an in vivo porcine
model. This facilitated the postoperative assessment of mechanical
stiffness variations through a well-established analytical model during
the healing period