A general designing approach for polarization-independent photonic on-chip systems

Due to that the polarization states in optical fibers change randomly during transmission, polarization-independent (PID) devices are demanded to receive lights with arbitrary polarization states. Compared with their orthogonal polarization states, the optical profiles of various modes of the same polarization are similar, and their directions of the main electric field are same. Therefore, it's much easier to design PID devices using multi-modes of one polarization state instead of orthogonal polarizations. This paper firstly presents a scalable method to achieve PID devices and systems by transforming the light orthogonal polarization states into one polarization with different modes. Taking thermo-optical switches as an example, the PDL of the fabricated 2 x 2 switch cell was about 0.8 dB at 1300-1360 nm, and its extinction ratio (ER) was larger than 19 dB for both polarizations. A 4 x 4 switch was also demonstrated and its function of dual polarization switching was implemented, whose ER was larger than 11 dB for both polarizations. This method has potential in constructing PID on-chip systems for optical communications, optical interconnections, etc

Data_Sheet_1_Surveillance for rhabdomyolysis after the consumption of crayfish in Wuhan, China, 2016–2022.PDF

ObjectivesTo analyze the epidemiological characteristics and etiology of crayfish-related rhabdomyolysis.MethodsCases of crayfish-related rhabdomyolysis in Wuhan were monitored, and professional training of city’s surveillance personnel was conducted. Unified questionnaires were used to collect data.ResultsThe first case of crayfish-related rhabdomyolysis occurred on July 12, 2016. Subsequently, 423 patients were reported over the next 7 years, with muscle pain, weakness, and chest distress as main symptoms. In total, 64.54% (273/423) of patients were females, and young adults (aged 20–49 years) account for 86.22% (363/423) of patients. The primary clinical presentations were muscle pain, muscle weakness, and chest discomfort. The median incubation time was 6 h. And the number of cases may be related to water levels in Yangzi river. Laboratory tests revealed elevated creatine kinase and myoglobin levels. In total, 95.16% (236/248) of patients had consumed crayfish tail shrimp and 91.53% (227/248) had consumed crayfish liver and pancreas (Female crayfish also contain ovaries). Only 25.00% (62/248) of patients had a history of alcohol consumption. On average, 227 patients consumed 15 (3–50) crayfish, of whom 84.14% (191/227) consumed more than 10 crayfish. All patients had a favorable prognosis.ConclusionCrayfish-related rhabdomyolysis is a kind of a case or cluster of patients present with severe myalgia or weakness of unknown etiology and mechanism disease in Wuhan, China, 2016–2022. Excessive consumption of crayfish may be a risk factor for the disease. The relationship between the specific parts of crayfish consumed and the onset of the disease is unclear, suggesting further research is needed to identify the relevant risk factors for the disease.</p

A π‑Electron Rich Cage via the Friedel–Crafts Reaction

A prism-shaped cage was obtained via the Friedel–Crafts reaction in a 2:3 mixture of trisfuryl and bis-isopropenyl precursors, in a remarkable yield of 40% considering six C–C bonds formed in a one-pot manner. The cage contains two π-electron rich trisfuryl platforms bridged in a face-to-face manner with three p-xylylene linkers. Therefore, it enables accommodation of π-electron poor guests with complementary size, including biscationic viologen

Fragmented Graphene Aerogel/Polydimethylsiloxane Sponges for Wearable Piezoresistive Pressure Sensors

High-performance flexible pressure sensors are critical to realizing electronic skin and wearable devices. It is the persistent pursuit of researchers to develop more sensitive flexible pressure sensors. Here, we propose a simple and effective strategy to fabricate flexible piezoresistive pressure sensors based on fragmented graphene aerogel (FGA)/polydimethylsiloxane (PDMS) sponges. Using FGA as a conductive filler and NaCl particles as a porogen and blending with PDMS, a composite material FGA@PDMS with a sponge structure was obtained. Then, the composite FGA@PDMS was dip-coated with FGA to achieve the FGA/FGA@PDMS sponge. Finally, the interdigitated electrode was printed as the bottom electrode by the screen-printing process to complete the preparation of the FGA/FGA@PDMS sensor. The results show that the fabricated flexible piezoresistive pressure sensor has higher sensitivity (0–10 kPa, 2235.84 kPa–1), good recovery, shorter response time (∼120 ms), and stable response under 1000 cycles of loading and unloading. Moreover, we investigated the applicability of the FGA/FGA@PDMS sensor as a wearable device and its application in practical sensing. Human motion detection such as arm bending, fingers, and soles of the feet shows that the sensor has good detection ability. The light-emitting-diode series circuit and the bluetooth-based wireless pressure sensor verification prototype system demonstrate the potential of the sensor for practical applications

Fragmented Graphene Aerogel/Polydimethylsiloxane Sponges for Wearable Piezoresistive Pressure Sensors

High-performance flexible pressure sensors are critical to realizing electronic skin and wearable devices. It is the persistent pursuit of researchers to develop more sensitive flexible pressure sensors. Here, we propose a simple and effective strategy to fabricate flexible piezoresistive pressure sensors based on fragmented graphene aerogel (FGA)/polydimethylsiloxane (PDMS) sponges. Using FGA as a conductive filler and NaCl particles as a porogen and blending with PDMS, a composite material FGA@PDMS with a sponge structure was obtained. Then, the composite FGA@PDMS was dip-coated with FGA to achieve the FGA/FGA@PDMS sponge. Finally, the interdigitated electrode was printed as the bottom electrode by the screen-printing process to complete the preparation of the FGA/FGA@PDMS sensor. The results show that the fabricated flexible piezoresistive pressure sensor has higher sensitivity (0–10 kPa, 2235.84 kPa–1), good recovery, shorter response time (∼120 ms), and stable response under 1000 cycles of loading and unloading. Moreover, we investigated the applicability of the FGA/FGA@PDMS sensor as a wearable device and its application in practical sensing. Human motion detection such as arm bending, fingers, and soles of the feet shows that the sensor has good detection ability. The light-emitting-diode series circuit and the bluetooth-based wireless pressure sensor verification prototype system demonstrate the potential of the sensor for practical applications

Fragmented Graphene Aerogel/Polydimethylsiloxane Sponges for Wearable Piezoresistive Pressure Sensors

High-performance flexible pressure sensors are critical to realizing electronic skin and wearable devices. It is the persistent pursuit of researchers to develop more sensitive flexible pressure sensors. Here, we propose a simple and effective strategy to fabricate flexible piezoresistive pressure sensors based on fragmented graphene aerogel (FGA)/polydimethylsiloxane (PDMS) sponges. Using FGA as a conductive filler and NaCl particles as a porogen and blending with PDMS, a composite material FGA@PDMS with a sponge structure was obtained. Then, the composite FGA@PDMS was dip-coated with FGA to achieve the FGA/FGA@PDMS sponge. Finally, the interdigitated electrode was printed as the bottom electrode by the screen-printing process to complete the preparation of the FGA/FGA@PDMS sensor. The results show that the fabricated flexible piezoresistive pressure sensor has higher sensitivity (0–10 kPa, 2235.84 kPa–1), good recovery, shorter response time (∼120 ms), and stable response under 1000 cycles of loading and unloading. Moreover, we investigated the applicability of the FGA/FGA@PDMS sensor as a wearable device and its application in practical sensing. Human motion detection such as arm bending, fingers, and soles of the feet shows that the sensor has good detection ability. The light-emitting-diode series circuit and the bluetooth-based wireless pressure sensor verification prototype system demonstrate the potential of the sensor for practical applications