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. 2023 Aug 5;123(16):9982–10078. doi: 10.1021/acs.chemrev.3c00139

Table 8. Electrical, Mechanical, and Optical Properties of Transparent Wearable Sensor Devices.

material sensitivity mechanical stability transparency ref
PU–PEDOT:PSS/SWCNT/PU–PEDOT:PSS GF: 62.3 (maximum, at 2.5% strain) tensile strain, 100%; stretching cycles, 1000 (20% strain) 63% (721)
  GF: 8.7–62.3 (1.6–3.5% strain range)      
          
AuNW/AgNW hybrid nanowire networks GF: 236.6 (0–5% strain, 1 layer of Au) tensile strain, 70%; stretching cycles, 1000 (10% strain) 58.7–66.7% (722)
  GF: 27.0 (0–40% strain, 4 layers of Au)      
  GF: 5.0 (0–70% strain, 6 layers of Au)      
          
ionic liquid (ethylene glycol/sodium chloride) GF: 2–3.6 (strain: 25–250%) tensile strain, 830%; stretching cycles, 3000 (300% strain)   (723)
          
zwitterionic [2-(methacryloyloxy ethyl]dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA) GF: 1.8 Tensile strain: 2000%   (724)
2-hydroxyethyl methacrylate (HEMA)        
laponite XLG nanosheets        
          
egg white and NaOH hydrogel GF: 0.86 (0–80% strain range) tensile strain, 200%; stretching cycles, 10000 (100% strain) 99.8% (725)
  GF: 0.21 (80–200% strain range)      
          
PEG diacrylate pressure, 3.1 nF kPa–1 (below 5 kPa); pressure, 1–13 kPa bending radius of curvature: 50 mm 99% (726)
1-ethyl-3-methylimidazolium tricyanomethanide        
2-hydroxy-2-methylpropiophenone        
          
scrylamide (AAm) base hydrogel 15% capacitance decrease by light touch from 20 mm above the surface of the sensor to light touch stretching cycles: 500000 (10% strain) 90% (727)
          
CVD graphene 6.55% kPa–1 (pressure range: 0–16 kPa) bending radius of curvature: 8 mm (500 cycles) >70% (728)
  1.15% kPa–1 (pressure range: 16–30 kPa)      
          
motion sensing: SWCNT/polylactic acid (PLA) composite-piezoelectric polymer pressure: 0.8 mV kPa–1 electrotactile stimulator: tensile strain 30% ∼80% (591)
electrotactile stimulator: AgNW/graphene   bending radius of curvature: 0.38 cm    
electrode: Au doped CVD graphene        
          
PDMS/boron nitride nanosheet piezoelectric charged constant: 50 pC N–1   65–81% (729)
  push force: 40–80 kg      
          
fluorinated ethylene propylene (FEP)/polyvinyl butyral (PVB)/FEP piezoelectric charged constant: 930 pC N–1   >80% (730)
PDMS/ITO coated PET     75% (731)
AgNF/PDMS   stretching cycles: 12000 (100% strain) >70% (627)
          
1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide 23.3 V kPa–1 (before 20 kPa) tensile strain: 1500% for iTPU 5% (732)
  3–6 V kPa–1 (beyond 20 kPa)      
          
temperature sensor, rGO/PU; strain sensor, AgNW/PEDOT:PSS/PU; electrode, PEDOT:PSS/PU temperature: ∼1.34% /°C tensile strain, 70%; stretching cycles, 10000 (30% strain) 75% (733)
  temperature: 30–80 °C      
  GF: 1 (2–5.8% tensile strain)      
  GF: 1.5 (2–5.8% compressive strain)      
          
strain sensor: AgNF/AgNW hybrid nanostructure temperature: 0.03%/°C in 30–45 °C tensile strain, 90%; stretching cycles, 15000 (70% strain) 89.05% (734)
temperature sensor: PEDOT:PSS strain: 1.78 × 10–3 kPa–1 (below 350 kPa) and 9.65 × 10–3 kPa–1 (above 350 kPa)      
          
temperature sensor: acrylamide (AAm), acrylic acid (AAc) based hydrogel temperature: −0.0289 °C1– (below ∼24 °C) and −0.0127 °C1– (above ∼24 °C) in the temperature range of 15–40 °C Tensile strain: 150% 7–96% (thermoresponsive) at 600 nm wavelength (735)
electrode: AgNW/Ag flakes        
          
AgNW/Triton X treated PDMS GF: 1.4 (0–5% strain) tensile strain, 400%; stretching cycles, 10000 (15% strain) AgNW, 75%; PDMS, 84.7% (736)
  GF: 13 (10–20% strain)      
          
AgNW/cPI with Kirigami structure   stretching cycles: 10000 (400% strain) 80% (599)
graphene/PEDOT:PSS on SEBS substrate   tensile strain: 40% 85% (737)
          
sensing layer: PEDOT:PSS light stimulation: 17–150 mW mW compression strain: 50% 60% (549)
electrode: Au grid        
          
graphene electrical stimulation   90% (738)
current: 50–300 μA (charge density: 116.07–174.10 μC cm–2)
          
PEDOT:PSS doped with ethylene glycol response: 105–722 μV (power 0.05–2 mW) light stimulation power: 0.05–2 mW (density: 5.78–231.09 mW mm–2)   85% (739)
          
graphene/AgNW glucose: minimum 0.4 μM stretching cycles: 5000 (25% strain), 10000 (20% strain) >91% (460)
GOD-pyrene functionalized graphene pressure: 2.64 MHz mm Hg1–      
          
P-type doped SWCNT 0.13 μA μM–1 cm–2   80% (740)
          
inkjet printed thin film optode Na+: 100 μM of NaCl (in 35 μL solution)     (741)
ink (chromoionophore I, potassium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, sodium ionophore IV)        
          
nano-Au/CNT/PDMS (Rs: 350 Ω/sq) nanostructured Au (clusters) H2O2: 8 nM (S/N ratio: 3) stretching cycles: 100 (50% strain) ∼65% (742)
          
sensing layer: graphene electrode: WO3/Au/WO3 conductance: 39.73 μA V–1 tensile strain: 0.324% graphene: 2.7% (743)
  0.763 μA mM–1 radius of curvature: 175 μm PET substrate: 98%  
  folding: 150° shrinking: ∼50% electrode: 81%