There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Elements Of X Ray Diffraction

https://cyberleninka.org/article/n/768408.pdf

Mechanical properties of graphene and graphene-based nanocomposites

Large-Scale Fabrication of Boron Nitride Nanosheets and Their Utilization in Polymeric Composites with Improved Thermal and Mechanical Properties

A review on carbon nanotubes and graphene as fillers in reinforced polymer nanocomposites

Development of tactile sensing technology has promoted intelligent human-machine interaction and recently has evolved out as one of the most promising area of electronics. Tactile sensing is a milestone in this field as it can extend the detection mode of tactile sensor through air. In this paper, we fabricated a tactile sensor using cellulose nanocrystal modified with graphene by isocyanate grafting. The new material is transparent, ecofriendly and integrated the capability of tactile sensing with fast response, high stability and high reversibility. Various materials from conducting metals to a human hand were checked for tactile sensing capability. It is found that the fabricated sensor could detect a human hand at a distance up to 6 mm away from the sensor. Combining the results, the discrete, flexible dual-mode tactile sensor fulfilled the technical and operational objectives of this work .

A tactile sensor made of graphene-cellulose nanocomposite

Synthesis and characterization of crystalline perfection on l-Lysine co-doping glycine barium chloride/C6H14N2O2 (L-LGBCAC) single crystal for NLO materials

Stretchable or elastic electronics is based on building electronic circuits or devices on stretchable substrates and its potential applications include skin sensors for robotics, wearable devices, and flesh-like biodevices. As the physically and chemically stable silicone rubber, polydimethylsiloxane (PDMS) has a unique flexibility with a shear elastic modulus 250 kPa and lowest glass transition temperature among other polymers; it is widely used to fabricate stretchable electronic materials. In addition, PDMS also possesses clean room processability, low curing temperature, high flexibility, possibility to change its functional groups, high compressibility, and very low change in elasticity versus temperature and time. This chapter addresses the applicability of patterned PDMS nanocomposites in electronics along with its advantages and limitations. Major areas such as sensors, actuators, light-emitting diodes, piezoelectrics, dielectrics, electromagnetic radiation shields, transistors, and supercapacitors are covered.

Electronic Applications of Polydimethylsiloxane and Its Composites

Abstract Wearable sensors have drawn considerable interest in the recent research world. However, simultaneously realizing high sensitivity and wide detection limits under changing surrounding environment conditions remains challenging. In the present study, we report a wearable piezoresistive pressure sensor capsule that can detect pulse rate and human motion. The capsule includes a flexible silicon cover and is filled with different PVA/MXene (PVA-Mx) composites by varying the weight percentage of MXene in the polymer matrix. Different characterizations such as XRD, FTIR and TEM results confirm that the PVA-Mx silicon capsule was successfully fabricated. The PVA-Mx gel-based sensor capsule remarkably endows a low detection limit of 2 kPa, exhibited high sensitivity of 0.45 kPa −1 in the ranges of 2–10 kPa, and displayed a response time of ~ 500 ms, as well as good mechanical stability and non-attenuating durability over 500 cycles. The piezoresistive sensor capsule sensor apprehended great stability towards changes in humidity and temperature. These findings substantiate that the PVA/MXene sensor capsule is potentially suitable for wearable electronics and smart clothing. 

/pdf/a-highly-sensitive-wearable-pressure-sensor-capsule-based-on-3j57qb9t.pdf

Kishor Kumar Sadasivuni

Papers

A tactile sensor made of graphene-cellulose nanocomposite

Synthesis and characterization of crystalline perfection on l-Lysine co-doping glycine barium chloride/C6H14N2O2 (L-LGBCAC) single crystal for NLO materials

Electronic Applications of Polydimethylsiloxane and Its Composites

A highly sensitive wearable pressure sensor capsule based on PVA/Mxene composite gel

A Hybrid Photo-Electro Catalytic Conversion of Carbon dioxide Using CuO–MgO Nanocomposite