Publications by authors named "Jae-Chul Yu"

Article Synopsis
  • Stretchable interconnects are essential for integrating flexible electronic components on a single substrate, but achieving high resolution and durability in their production remains a challenge.
  • The researchers developed a self-assembled silver nanofilm interlocked with an elastomeric nanodielectric, allowing for photolithographic patterning while maintaining high stretchability (around 200%) and conductivity without the need for thermal annealing.
  • They found that narrower silver microstrips (100 μm) show enhanced stretchability, but further scaling leads to crack issues; using serpentine designs can minimize resistance changes, and these interconnects can power LEDs as an example application.
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Elastomeric dielectrics are crucial for reliably governing the carrier densities in semiconducting channels during deformation in soft/stretchable field-effect transistors (FETs). Uncontrolled stacking of polymeric chains renders elastomeric dielectrics poorly insulated at nanoscale thicknesses, thereby thick films are usually required, leading to high voltage or power consumption for on/off operations of FETs. Here, layer-by-layer assembly is exploited to build 15-nm-thick elastomeric nanodielectrics through alternative adsorption of oppositely charged polyurethanes (PUs) for soft and hysteresis-free FETs.

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With the advent of the era of consumer-oriented displays and mobile devices, the importance of barrier film coatings for securing devices from oxygen or moisture penetration has become more salient. Recently developed approaches to generate gas barrier films in a combination of polyelectrolyte multilayer matrices and incorporated inorganic nanosheets have shown great potential in outperforming conventional gas barrier films. However, these films have the intrinsic drawback of vulnerability to brittleness and inability to stretch for flexible device applications.

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