Pq 10

The polyethylene terephtalate (PET) substrate Polifoil Bias is purchased from Policrom Screen. Ag 5000, DuPont Silver Ink is used for printed interconnects. Carbon ink 7102 printing paste from DuPont is used for the electrode contacts. Insulating ink (5018, DuPont) is used for electrode isolation. PQ-10, PSSNa, and BBL were purchased from Sigma-Aldrich and used as received. The P(g42T-T) and BBL inks are fabricated through a solvent exchange method. P(g₄2T-T) (30 mg) dissolved in chloroform (15 mL) is added dropwise to isopropanol (75 mL) under high speed stirring (1500 rpm) to obtain bright blue nanoparticles of P(g₄2T-T). BBL (30 mg) dissolved in methanesulfonic acid (15 mL) is added dropwise to isopropanol (75 mL) under high-speed stirring (1500 rpm) to obtain dark purple BBL nanoparticles. The P(g₄2T-T) and BBL nanoparticles are respectively collected by centrifugation (5000 rpm, 30 min) and washed in IPA six times until neutral. The neutral P(g₄2T-T) and BBL nanoparticles are re-dispersed in IPA to obtain dispersion inks (about 0.006 mg/mL for P(g₄2T-T) and 0.1 mg/mL for BBL)^{34 ,46 (link)}.

Alg, Pq10, sodium hydroxide, sodium chloride, sodium dihydrogen phosphate monohydrate (all purchased from Sigma-Aldrich Co., St. Louis, MO, USA), 4-hexylresorcinol (HR, Sigma Aldrich, Schnelldorf, Germany), hydrochloric acid and ethanol (purchased from Chimmed, Moscow, Russia) were used without further purification.
All solutions were prepared with double-distilled water additionally filtered through a Milli-Q Millipore system.
Concentrations of the polysaccharides are presented in moles of the ionic groups per liter. The concentration of Alg anionic groups was determined via reverse potentiometric titration [60 (link)]. The concentration of cationic quaternary amino fragments of Pq10 was evaluated using the turbidimetric method [61 ].