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Related Concept Videos

Classifying Matter by Composition03:35

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Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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 Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
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The blood in our bodies comprises three major components: blood plasma, formed elements, and the extracellular matrix. Blood plasma is a yellowish fluid that constitutes 55% of the total blood volume. It is primarily made up of water and essential substances such as electrolytes and proteins. Blood plasma serves as a medium for transporting blood cells and also contains nutrients, enzymes, hormones, antibodies, and gases.
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A composite body is a body made up of multiple parts, connected to form a larger, unified object. Each part has its own weight and center of gravity, which must be considered to determine the center of gravity of the composite body. In cases where the density or specific weight is constant, the center of gravity coincides with the centroid.
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PDMS/Polyimide Composite as an Elastomeric Substrate for Multifunctional Laser-Induced Graphene Electrodes.

Matteo Parmeggiani1,2, Pietro Zaccagnini1,2, Stefano Stassi2

  • 1Center for Sustainable Future Technologies , Istituto Italiano di Tecnologia , Via Livorno, 60 , 10144 Torino , Italy.

ACS Applied Materials & Interfaces
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PubMed
Summary

Researchers developed a new method to create laser-induced graphene (LIG) on stretchable materials. This breakthrough enables the creation of advanced flexible electronics and functional devices using a novel polyimide and silicone composite.

Keywords:
PDMS compositelaser-induced graphenepolyimide powderstrain sensorssupercapacitors

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Laser-induced graphene (LIG) is a promising material for flexible electronics.
  • Previous methods failed to create LIG on elastomeric substrates, limiting applications in stretchable electronics.

Purpose of the Study:

  • To develop a novel method for fabricating graphene-based electrodes on elastomeric substrates.
  • To enable the creation of LIG on stretchable materials for advanced electronic applications.

Main Methods:

  • A new composite material was created by dispersing polyimide (PI) powder into a poly(dimethylsiloxane) (PDMS) matrix.
  • Direct laser writing was used to convert the surface of the PDMS/PI composite into LIG.
  • The mechanical and electrical properties were tuned by adjusting the PI concentration.

Main Results:

  • Successfully fabricated LIG onto a novel, easily processable elastomeric substrate (PDMS/PI composite).
  • Demonstrated tunable mechanical and electrical properties by varying PI concentration.
  • Produced conformable graphene electrodes suitable for complex shapes and 3D structures.

Conclusions:

  • The developed PDMS/PI composite is a viable substrate for LIG fabrication.
  • This method overcomes previous limitations, paving the way for LIG in stretchable electronics.
  • Prototypes like electrochemical capacitors and strain gauges showcase the material's multifunctional capabilities.