User-interactive electronic skin for instantaneous pressure visualization
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Citations
Numerical and Experimental Study of the Mechanical Response of Diatom Frustules.
Layout-to-Bitmap Conversion and Design Rules for Inkjet-Printed Large-Scale Integrated Circuits.
Self-adaptive cardiac optogenetics device based on negative stretching-resistive strain sensor.
Determination of individual contact interfaces in carbon nanotube network-based transistors
Nanoscale Materials and Deformable Device Designs for Bioinspired and Biointegrated Electronics
References
Organic Electroluminescent Diodes
Materials and mechanics for stretchable electronics
Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes
A stretchable carbon nanotube strain sensor for human-motion detection
Highly sensitive flexible pressure sensors with microstructured rubber dielectric layers
Related Papers (5)
Frequently Asked Questions (14)
Q2. What is the function generator used to obtain the waveform from the output node?
Function generator is used tosupply square wave inputs (-5 to 5 V rail-to-rail) to the gate of the carbon nanotube TFT, and anoscilloscope is used to obtain the waveform from the output node.
Q3. What is the process of evaporation of the OLED?
Bake the sample in air at 250 C on a hotplate for 30 minutes to anneal the sputtered ITOand hard bake the photoresist.d) OLED evaporation through a shadow mask with pixel patterns using a high vacuum (~2×10-6 mbar) thermal evaporator in a glovebox.e)
Q4. how many g of weight is placed onto the PDMS?
200 g of weight is placed onto the PDMS with a size of around 0.5 cm2 and the corresponding pressure is 39.2 kPa. (c) The corresponding optical output from the same system.
Q5. How much pressure is needed to produce visible outputsignal?
In their current work, ~ 8.5 kPa of applied pressure is necessary to produce visible outputsignal (i.e., >1 Cd/m2) from the OLEDs as depicted in Fig.
Q6. What is the power consumption of the e-skin matrix?
The total static power consumption of the e-skin matrix caused by the off-stateleakage current of the TFTs is estimated to be ~ 1.4 mW for a VDD of 10 V.NATURE MATERIALS | www.nature.com/naturematerials
Q7. how can a carbon nanotube be bent?
S7Carbon nanotube TFTs and OLEDs can be bent to a curvature radius of ~ 4 mm withoutsignificant change in the electrical characteristics as depicted in Fig. S3a-b.
Q8. How much current is required to obtain a brightness of 100 Cd/m2?
Using the blue OLED as an example, it can be deducedthat a current level of ~200 µA/mm2 is required to obtain a brightness of ~100 Cd/m2.
Q9. What is the cutoff frequency for the active-matrix backplane?
for thenanotube transistors used in the active-matrix backplane in this paper, the cutoff frequency isestimated to be around 6.8 MHz for a channel length of 20 μm.
Q10. What is the operating speed of the single pixel circuit?
The authors note that the operating speed of the single pixel circuit is slower than the intrinsicperformance of nanotube TFTs (~ 7 MHz), which is extracted after de-embedding all the parasiticcapacitances.
Q11. how many ft of nanotube transistors are used in this work?
The ft of the nanotube transistors was measured to bethe ft can be considered inversely proportional to channel length squared (L2).
Q12. What is the simplest way to read out the data?
The realization would require fast refresh rate line-by-line scan so that all the active OLEDs can be visible to the human eye simultaneously.
Q13. What is the sensitivity of the OLEDs under pressure?
(c) Log-scale current (red trace) and brightness (blue trace) of an OLED/PSR combination circuit as a function of applied pressure.
Q14. What is the bending radii of the circuit?
Figure S9. (a) I-V characteristics of a parylene-encapsulated green OLED measured under various bending radii showing that parylene does not compromise the mechanical flexibility of the device.