TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Landsiedel, Justus
A1  - Root, Waleri
A1  - Schramm, Christian
A1  - Menzel, Alexander
A1  - Witzleben, Steffen
A1  - Bechtold, Thomas
A1  - Pham, Tung
T1  - Tunable colors and conductivity by electroless growth of Cu/Cu2O particles on sol-gel modified cellulose
JF  - Nano Research
N2  - Development of colored surfaces by formation of nano-structured aggregates is a widely used strategy in nature to color lightweight structures (e.g. butterflies) without the use of dye pigments. The deposition of nanoscale particles mimics nature in it’s approach coloring surfaces. This work presents sol-gel modification of cellulose surfaces used to form a template for growth of Cu/Cu2O core-shell particles with defined size-distributions. Besides improving the adhesion of the deposited particulate material, the sol-gel matrix serves as a template for the control of particle sizes of the Cu/Cu2O structures, and as a consequence of particle size variation the surface color is tunable. As an example, red color was achieved with an average particle size of 35 nm, and shifts gradually to blue appearance when particles have grown to 80 nm on the sol-gel modified fabric. The copper concentration on representative fabrics is kept low to avoid modifying the textile characteristics and were all in the range of 150–170 mg per g of cellulose material. As a result of copper deposition on the surface of the material, the cellulose fabric also became electrically conductive. Remarkably, the electrical conductivity was found to be dependent on the average particle sizes of the deposits and thus related to the change in observed color. The generation of color by growth of nano-sized particles on sol-gel templates provides a highly promising approach to stain surfaces by physical effects without use of synthetic colorants, which opens a new strategy to improve environmental profile of coloration.
KW  - electroless copper deposition
KW  - sol-gel support
KW  - thin film
KW  - structural coloration
KW  - tunable sheet resistance
KW  - LSPR
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-49680
SN  - 1998-0124
SS  - 1998-0124
U6  - https://doi.org/10.1007/s12274-020-2907-5
DO  - https://doi.org/10.1007/s12274-020-2907-5
VL  - 13
IS  - 10
SP  - 2658
EP  - 2664
PB  - Tsinghua University Press, Springer
ER  -