Patterned arrays of assembled nanoparticles prepared by interfacial assembly and femtosecond laser fabrication

Jiang, Chengpeng; Oshima, Daiki; Iwata, S.; Pong, Philip W. T.; Kato, Takeshi

doi:10.1007/s11051-019-4718-8

Cited by 93 publications

(4 citation statements)

References 57 publications

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“…Top-down and bottom-up approaches are important strategies for the generation of MNPs. The top-down method starts using bulk material then processed via different techniques including laser ablation and lithography (Xiao et al, 2017;Jiang et al, 2020). The bottom-up approach starts using metal ions in solution through chemical strategies as the most commonly applied method.…”

Section: Synthesis Of Magnetic Nanoparticlesmentioning

confidence: 99%

The Potential Application of Magnetic Nanoparticles for Liver Fibrosis Theranostics

et al. 2021

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Liver fibrosis is a major cause of morbidity and mortality worldwide due to chronic liver damage and leading to cirrhosis, liver cancer, and liver failure. To date, there is no effective and specific therapy for patients with hepatic fibrosis. As a result of their various advantages such as biocompatibility, imaging contrast ability, improved tissue penetration, and superparamagnetic properties, magnetic nanoparticles have a great potential for diagnosis and therapy in various liver diseases including fibrosis. In this review, we focus on the molecular mechanisms and important factors for hepatic fibrosis and on potential magnetic nanoparticles-based therapeutics. New strategies for the diagnosis of liver fibrosis are also discussed, with a summary of the challenges and perspectives in the translational application of magnetic nanoparticles from bench to bedside.

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Section: Synthesis Of Magnetic Nanoparticlesmentioning

confidence: 99%

The Potential Application of Magnetic Nanoparticles for Liver Fibrosis Theranostics

et al. 2021

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“…1(a), α is the orientational angle. The choice of aligned anisotropy axis is considered for two reasons: (1) The assembly with aligned anisotropy axes can be realized experimentally [47][48][49]. They have distinct magnetic features, which could be useful in various applications.…”

Section: Modelmentioning

confidence: 99%

Relaxation in Ordered Assembly of Magnetic Nanoparticles

Anand

2021

Preprint

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We study the relaxation characteristics in the two-dimensional (l x × l y ) array of magnetic nanoparticles (MNPs) as a function of aspect ratio A r = l y /l x , dipolar interaction strength h d and anisotropy axis orientation using computer simulation. The anisotropy axes of all the MNPs are assumed to have the same direction, α being the orientational angle. Irrespective of α and A r , the functional form of the magnetization-decay curve is perfectly exponentially decaying with h d ≤ 0.2. There exists a transition in relaxation behaviour at h d ≈ 0.4; magnetization relaxes slowly for α ≤ 45 • ; it relaxes rapildy with α > 45 • . Interestingly, it decays rapidly for h d > 0.6, irrespective of α. It is because the dipolar interaction promotes antiferromagnetic coupling in such cases. There is a strong effect of α on the magnetic relaxation in the highly anisotropic system (A r ≥ 25). Interesting physics unfolds in the case of a huge aspect ratio A r = 400. There is a rapid decay of magnetization with α, even for weakly interacting MNPs. Remarkably, magnetization does not relax even with a moderate value of h d = 0.4 and α = 0 • because of ferromagnetic coupling dominance. Surprisingly, there is a complete magnetization reversal from saturation (+1) to −1 state with α > 60 • . The dipolar field and anisotropy axis tend to get aligned antiparallel to each other in such a case. The effective Néel relaxation time τ N depends weakly on α for small h d and A r ≤ 25.0. For large A r , there is a rapid fall in τ N as α is incremented from 0 to 90 • . These results benefit applications in data and energy storages where such controlled magnetization alignment and desired structural anisotropy are desirable.

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“…In recent years, flexible tactile sensors have been extensively studied through the mimicry of structural and functional characteristics of human finger and human skin. [ 1–3 ] Enabled by nanoengineering and flexible electronics, [ 4–8 ] accurate detection of physical stimuli such as pressure, temperature, and humidity has been realized in flexible tactile sensors, rendering them both high sensitivity and excellent flexibility comparable to human skin (hence the name “artificial skin”). [ 4,9 ] To allow for applications in robotics, slip detection during the grasping and manipulation of objects is a critical function that should be included in the flexible tactile sensor when used in robotic hand or manipulator.…”

Section: Introductionmentioning

confidence: 99%

Finger‐Skin‐Inspired Flexible Optical Sensor for Force Sensing and Slip Detection in Robotic Grasping

Jiang

Zhang

Pan

et al. 2021

Adv Materials Technologies

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by nanoengineering and flexible electronics, [4][5][6][7][8] accurate detection of physical stimuli such as pressure, temperature, and humidity has been realized in flexible tactile sensors, rendering them both high sensitivity and excellent flexibility comparable to human skin (hence the name "artificial skin"). [4,9] To allow for applications in robotics, slip detection during the grasping and manipulation of objects is a critical function that should be included in the flexible tactile sensor when used in robotic hand or manipulator. [10][11][12] Widerange force sensing and fast-response slip detection are needed in robotic grasping and dexterous manipulation for the purpose of measuring the contact force and preventing object slippage. For example, home robots and nursing robots would be expected to safely deliver objects and operate instruments, while manufacturing robots and industrial robots would be assigned to perform manipulation and assembly tasks in high precision. [11,13] However, the development of flexible tactile sensor with simultaneous force sensing and slip detection for robotic grasping still remain difficult due to considerations on sensor design, sensor performance, and sensor integration with robotic system. [13][14][15] From the application perspective, flexible tactile sensor capable of detecting the contact force and obtaining friction/slip information is desirable for intelligent robotic manipulators, if they are anticipated to adjust grasping force and posture in accordance with the shape, weight, and friction coefficient of the grasped objects for achieving dexterous manipulation and automatic grasping in scenarios such as human-machine interface, robotic surgery, intelligent manufacturing, etc.Flexible tactile sensors based on electrical sensing scheme, including capacitive, resistive, piezoelectric, and triboelectric mechanisms, have already been widely reported over the past decade. These electronic tactile sensors usually mimic the biological features of the delicate tactile sensation in human skin, such as the epidermis-dermis interface, sensory receptors, fingerprint patterns, and ionic stimuli in afferent neuron. [16][17][18][19][20] Multimodal sensing capabilities and other special properties ranging from self-healing, self-powering, energy harvesting, stimuli visualization, to environmental adaptation, have also been attempted in these electronic tactile sensors, but several drawbacks including high fabrication cost, parasite effect, complicated circuitry, and signal crosstalk may place constraints on their practical applications in robotics. [15,[21][22][23][24] AsThe finger skin of human plays a key role in amplifying and transferring tactile signals to sensory receptors, and it provides design guidelines for next-generation flexible tactile sensors. To enable robotic applications such as dexterous manipulation and tactile feedback, the functions of force sensing and slip detection are crucial for flexible tactile sensors. Here, a finger-skin inspired flexible optical (FIFO...

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Patterned arrays of assembled nanoparticles prepared by interfacial assembly and femtosecond laser fabrication

Cited by 93 publications

References 57 publications

The Potential Application of Magnetic Nanoparticles for Liver Fibrosis Theranostics

The Potential Application of Magnetic Nanoparticles for Liver Fibrosis Theranostics

Relaxation in Ordered Assembly of Magnetic Nanoparticles

Finger‐Skin‐Inspired Flexible Optical Sensor for Force Sensing and Slip Detection in Robotic Grasping

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