An Overview of the Development of Flexible Sensors

et al. 2019

InfoMat

105

The Internet of Everything (IoE), which aims to realize information exchange and communications for anything with the Internet, has revolutionized our modern world. Serving as the driving force for devices in the IoE network, power supply systems play a fundamental role in the development of the IoE. However, due to the complexity, multifunctionality and wide‐scale deployment of diverse applications, power supply systems face great challenges, including distribution, connection, charging technologies, and management. In this review, some challenges and advances in the development of both power supply systems and their units are presented. In the overall system‐level field, establishing sustainable and maintenance‐free power supply systems through wireless connections, efficient power management and integrated energy harvesting and storage systems is highlighted. Additionally, the main performance metrics of power supply units are discussed, including energy density, service life, and self‐power ability. In addition, some directions of power quality assessment for both the system and unit levels of power supply systems are presented, aiming to provide insight into the future development of high‐performance power supply systems for the IoE.

Section: Introductionmentioning

confidence: 99%

Advances in the development of power supplies for the Internet of Everything

Fan

et al. 2019

InfoMat

105

“…The FoVs of single ommatidium and the entire component are experimentally measured as 8° and 148°, respectively. The thin shell structure reduces the imaging aberration of the sub‐apertures at different azimuth angles; meanwhile, such structure makes the focal plane of the component just beneath its inner surface, which makes it probable to directly couple with newly introduced curved or flexible sensor arrays . Owing to the merits of: i) high‐quality imaging with remarkable IR spectral selectivity; ii) massively integrated imaging sub‐aperture array with enlarged FoV; iii) compact and wafery structure with potential integration with arrayed sensor, such proposed IR ACE component is perspective to find applications in IR imaging and 3D positioning.…”

Section: Introductionmentioning

confidence: 99%

IR Artificial Compound Eye

Advanced Optical Materials

Bian

Zhang

et al. 2019

In this work, a 3D IR artificial compound eye (ACE) optical component is fabricated using thermoplastic IR polymer material. The femtosecond laser‐assisted wet etching and the 3D nano‐imprinting techniques are proposed for fabricating this thin shell multi‐aperture component. The prepared component is close‐packed with over 1000 high‐quality micro‐facet‐lenslets (ommatidia) on the semispherical thin shell dome with base radius of 2.7 mm and sag height of 2.1 mm, enabling enlarged field of view to 148°. The ommatidia with diameter of 150 µm and numerical aperture of 0.35 are demonstrated to have a practical spatial resolution up to 160 lp mm−1. IR imaging experiments (both in passive and active scenarios) confirm its outstanding optical properties and uniformity, and demonstrate the probability of thermal target imaging with such component in the near‐infrared band. The proposed fabrication strategy shows remarkable efficiency and advantage in massive replication, and such ACE component predicts its potential in emerging applications, such as IR imaging, target tracking, and so on.

“…[1][2][3][4][5] Fluorescent sensor is one of the most attractive sensors because of its advantages in sensitivity, selectivity, and easy operation. Lots of attention has been paid to sensor development, and tremendous progress has been achieved.…”

Section: Introductionmentioning

confidence: 99%

Porous Particle‐Based Inkjet Printing of Flexible Fluorescent Films: Enhanced Sensing Performance and Advanced Encryption

Adv Materials Technologies

Shang

et al. 2019

Innovative design and fabrication of fluorescent films are key steps in the development of film‐based fluorescent sensors, where both sensing unit and substrate are crucial to the performance of the films. To improve sensing performance via increasing mass transfer, hierarchical porous particles are chosen as substrate. NBDCOOH is adopted as a representative sensing fluorophore, and is immobilized onto the particles via physical adsorption. Dispersing the fluorescent particles into a mixture of ethanol and glycerol results in a fluorescent ink. It is demonstrated that the fluorescence of the film obtained from this particle‐based ink is more than 45 times stronger than that from pure NBDCOOH solution. In addition, the particle‐based film shows much improved photochemical stability and enhanced sensing performance. Owing to its printability, it can be used to generate complex patterns, which can be used for advanced information encryption.