High-performance electromagnetic interference (EMI) shielding materials with ultralow density, excellent flexibility, and good mechanical properties are highly desirable for aerospace and wearable electronics. Herein, honeycomb porous graphene (HPG) fabricated by laser scribing technology is reported for EMI shielding and wearable applications. Due to the honeycomb structure, the HPG exhibits an EMI shielding effectiveness (SE) up to 45 dB at a thickness of 48.3 μm. The single-piece HPG exhibits an ultrahigh absolute shielding effectiveness (SSE/t) of 240 123 dB cm 2 /g with an ultralow density of 0.0388 g/cm 3 , which is significantly superior to the reported materials such as carbon-based, MXene, and metal materials. Furthermore, MXene and AgNWs are employed to cover the honeycomb holes of the HPG to enhance surface reflection; thus, the SSE/t of the HPG/AgNWs composite membrane can reach up to 292 754 dB cm 2 /g. More importantly, the HPG exhibits excellent mechanical stability and durability in cyclic stretching and bending, which can be used to monitor weak physiological signals such as pulse, respiration, and laryngeal movement of humans. Therefore, the lightweight and flexible HPG exhibits excellent EMI shielding performance and mechanical properties, along with its low cost and ease of mass production, which is promising for practical applications in EMI shielding and wearable electronics.
Glaucoma, a chronic optic neuropathy, is the leading cause of irreversible blindness in the world. Elevated intraocular pressure (IOP) has been considered to be the major contributor to glaucoma for a long time and is currently proved to be the only modifiable risk factor for the progression of optic neuropathy. IOP fluctuates throughout the day with a circadian rhythm change and is affected by body gesture changes. Moreover, the IOP spike usually occurs at night or in the early morning. Therefore, the current clinical practice of single and static measurements of IOP during office hours is not conducive to the early diagnosis and treatment of glaucoma. This review focuses on current advances in implantable and noninvasive IOP sensors for obtaining 24‐hour continuous IOP profiles. The content summarizes and classifies IOP sensors based on their working principles and provides representative examples of the sensors for IOP monitoring. Finally, the review further analyzes the challenges of current IOP sensors for clinical practice and puts forward the prospect of IOP sensors in the future.
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