Coloration on Bluish Alginate Films with Amorphous Heterogeneity Thereof
Using sodium alginate (Alg) aqueous solution containing indigo carmine (IdC) at various concentrations we characterized the rippled surface pattern with micro-spacing on a flexible film as intriguing bluish Alg–IdC iridescence. The characterization was performed using Fourier-transform infrared spec...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/17/3627 |
| _version_ | 1797581971256246272 |
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| author | Soo-Yeon Yang Dong-Soo Kang Chang-Yull Lee |
| author_facet | Soo-Yeon Yang Dong-Soo Kang Chang-Yull Lee |
| author_sort | Soo-Yeon Yang |
| collection | DOAJ |
| description | Using sodium alginate (Alg) aqueous solution containing indigo carmine (IdC) at various concentrations we characterized the rippled surface pattern with micro-spacing on a flexible film as intriguing bluish Alg–IdC iridescence. The characterization was performed using Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, field emission scanning electron microscopy, atomic force microscopy, electron microscopy, differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction analysis, and photoluminescence detection. The edge pattern on the film had a maximum depth of 825 nm, a peak-to-peak distance of 63.0 nm, and an average distance of 2.34 nm. The center of the pattern had a maximum depth of 343 nm and a peak-to-peak distance of 162 nm. The pattern spacing rippled irregularly, widening toward the center and narrowing toward the edges. The rippled nano-patterned areas effectively generated iridescence. The ultraviolet absorption spectra of the mixture in the 270 and 615 nm ranges were the same for both the iridescent and non-iridescent film surfaces. By adding Ag<sup>+</sup> ions to Alg–IdC, self-assembled microspheres were formed, and conductivity was improved. Cross-linked bluish materials were immediately formed by the addition of Ca<sup>2+</sup> ions, and the film was prepared by controlling their concentration. This flexible film can be used in applications such as eco-friendly camouflage, anti-counterfeiting, QR code materials for imaging/sensing, and smart hybrid displays. |
| first_indexed | 2024-03-10T23:14:13Z |
| format | Article |
| id | doaj.art-443641db500348f2ad75f96ab22a0135 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T23:14:13Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-443641db500348f2ad75f96ab22a01352023-11-19T08:44:16ZengMDPI AGPolymers2073-43602023-09-011517362710.3390/polym15173627Coloration on Bluish Alginate Films with Amorphous Heterogeneity ThereofSoo-Yeon Yang0Dong-Soo Kang1Chang-Yull Lee2Institute of Aerospace System, Inha University, Incheon 21999, Republic of KoreaDepartment of Materials Science and Engineering, Inha University, Incheon 22212, Republic of KoreaDepartment of Aerospace Engineering, Inha University, Incheon 21999, Republic of KoreaUsing sodium alginate (Alg) aqueous solution containing indigo carmine (IdC) at various concentrations we characterized the rippled surface pattern with micro-spacing on a flexible film as intriguing bluish Alg–IdC iridescence. The characterization was performed using Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, field emission scanning electron microscopy, atomic force microscopy, electron microscopy, differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction analysis, and photoluminescence detection. The edge pattern on the film had a maximum depth of 825 nm, a peak-to-peak distance of 63.0 nm, and an average distance of 2.34 nm. The center of the pattern had a maximum depth of 343 nm and a peak-to-peak distance of 162 nm. The pattern spacing rippled irregularly, widening toward the center and narrowing toward the edges. The rippled nano-patterned areas effectively generated iridescence. The ultraviolet absorption spectra of the mixture in the 270 and 615 nm ranges were the same for both the iridescent and non-iridescent film surfaces. By adding Ag<sup>+</sup> ions to Alg–IdC, self-assembled microspheres were formed, and conductivity was improved. Cross-linked bluish materials were immediately formed by the addition of Ca<sup>2+</sup> ions, and the film was prepared by controlling their concentration. This flexible film can be used in applications such as eco-friendly camouflage, anti-counterfeiting, QR code materials for imaging/sensing, and smart hybrid displays.https://www.mdpi.com/2073-4360/15/17/3627alginateiridescencestructural colorationmicro-spacingself-assemblyhydrogel |
| spellingShingle | Soo-Yeon Yang Dong-Soo Kang Chang-Yull Lee Coloration on Bluish Alginate Films with Amorphous Heterogeneity Thereof Polymers alginate iridescence structural coloration micro-spacing self-assembly hydrogel |
| title | Coloration on Bluish Alginate Films with Amorphous Heterogeneity Thereof |
| title_full | Coloration on Bluish Alginate Films with Amorphous Heterogeneity Thereof |
| title_fullStr | Coloration on Bluish Alginate Films with Amorphous Heterogeneity Thereof |
| title_full_unstemmed | Coloration on Bluish Alginate Films with Amorphous Heterogeneity Thereof |
| title_short | Coloration on Bluish Alginate Films with Amorphous Heterogeneity Thereof |
| title_sort | coloration on bluish alginate films with amorphous heterogeneity thereof |
| topic | alginate iridescence structural coloration micro-spacing self-assembly hydrogel |
| url | https://www.mdpi.com/2073-4360/15/17/3627 |
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