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Monodisperse silver nanoparticles conductive ink was successfully synthesized by in-situ synthesis method in an aqueous solution. The size distribution of the Ag nanoparticles was tested and the average diameter was within 10 nm. A spontaneous coalescence and sintering of Ag NPs at 60 °C for 30 min was realized in the presence of hydrogen chloride. The interface bonding between dispersant and silver nanoparticles was investigated by XRD and FTIR. The conductive ink doped with polyaniline has a good adhesion to cotton surface and better conductivity. The highest conductivity was 2 × 10 −5 Ω m when the silver content was 30 wt.%. This prepared conductive ink could be printed on cotton fabric to form conductive circuits and the conductivity can remain at least 30 days. These promising results suggest applications of printed electronics devices using textiles as substrates. [ABSTRACT FROM AUTHOR]

• A novel LbL self-assembly method was used to prepare a light-responsive textile. • The prepared cotton fabric exhibits excellent photochromic properties. • The photochromic cotton fabric is expected to used in wearable smart textiles. Materials with reversible optical properties under light irradiation have great potential application in various optoelectronic fields. Particularly, photochromic materials have received extensive attention in many fields. Herein, a novel composite photochromic fabric was fabricated via Layer-by-Layer self-assembling of phosphomolybdic acid (PMoA) and polyacrylamide (PAM). Based on the established electron transfer photochromic system, the dynamic manipulation of photochromic behavior of the cotton fabric was achieved with outstanding fine high-resolution image under the visible light irradiation. The prepared fabric can change from colorless to blue rapidly (within 5 min) under UV light and maintain excellent reusability photochromic performance after more than 20 reversible color changing cycles, implying its great potential applications in the field of intelligent devices and UV detection in sunlight. Moreover, we constructed fabric weaving and developed a Quick Response (QR) code security identification to prove the practical application of the prepared photochromic fabric in the fields of wearable, optical information storage and information security encryption. [ABSTRACT FROM AUTHOR]