Tuning the Structural Color of a 2D Photonic Crystal using a Bowl-Like ...
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Tuning the Structural Color of a 2D Photonic Crystal using a Bowl-Like Nanostructure Ha Nee Umh,‡ Sungju Yu,‡ Yong Hwa Kim, Su Young Lee, and Jongheop Yi*
World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), Institute of Chemical Processes, Seoul National University, Seoul 151742, Republic of Korea. ‡
H. N. Umh and S. Yu contributed equally to this work.
*E-mail: [email protected]
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Figure S1. SEM images of TiO2 nanobowl arrays fabricated in the second batch under the different applied voltages: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V. All scale bars represent 100 nm.
S2
Figure S2. SEM images of TiO2 nanobowl arrays fabricated in the third batch under the different applied voltages: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V. All scale bars represent 100 nm.
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Figure S3. Diameter distribution histograms of TiO2 nanobowl arrays that prepared by altering anodizing potential: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V.
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Figure S4. Cross-sectional SEM images of TiO2 nanobowl arrays which were fabricated at anodizing conditions of (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V. Scale bars indicate a length of 100 nm.
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Figure S5. Reflectance spectra of TiO2 nanobowl arrays with different diameters that fabricated by applying anodizing voltages: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V.
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Figure S6. CIE 1931 chromaticity diagram representing the structural colors of the TiO2 nanobowl arrays which were fabricated at anodizing conditions of (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V.
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Figure S7. Adhesion tape peeling test to analyze the mechanical stability of TiO2 nanobowl arrays: (a) before the attachment of a tape, (b) a tape attached on the TiO2 nanobowl arrays, and (c) after the dettachment of the tape from the TiO2 nanobowl arrays.
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Figure S8. TiO2 nanobowl arrays immersed in various solvents; (a) water, (b) 1 M NaCl, (c) 1 M HNO3, (d) 1 M NaOH, (e) ethanol, (f) acetone, (g) benezene, and (h) toluene.
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Tuning the Structural Color of a 2D Photonic Crystal using a Bowl-Like Nanostructure Ha Nee Umh,‡ Sungju Yu,‡ Yong Hwa Kim, Su Young Lee, and Jongheop Yi*
World Class University (WCU) Program of Chemical Convergence for Energy & Environment (C2E2), Institute of Chemical Processes, Seoul National University, Seoul 151742, Republic of Korea. ‡
H. N. Umh and S. Yu contributed equally to this work.
*E-mail: [email protected]
S1
Figure S1. SEM images of TiO2 nanobowl arrays fabricated in the second batch under the different applied voltages: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V. All scale bars represent 100 nm.
S2
Figure S2. SEM images of TiO2 nanobowl arrays fabricated in the third batch under the different applied voltages: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V. All scale bars represent 100 nm.
S3
Figure S3. Diameter distribution histograms of TiO2 nanobowl arrays that prepared by altering anodizing potential: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V.
S4
Figure S4. Cross-sectional SEM images of TiO2 nanobowl arrays which were fabricated at anodizing conditions of (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V. Scale bars indicate a length of 100 nm.
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Figure S5. Reflectance spectra of TiO2 nanobowl arrays with different diameters that fabricated by applying anodizing voltages: (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V.
S6
Figure S6. CIE 1931 chromaticity diagram representing the structural colors of the TiO2 nanobowl arrays which were fabricated at anodizing conditions of (a) 30 V, (b) 40 V, (c) 50 V, (d) 60 V, (e) 65 V, and (f) 75 V.
S7
Figure S7. Adhesion tape peeling test to analyze the mechanical stability of TiO2 nanobowl arrays: (a) before the attachment of a tape, (b) a tape attached on the TiO2 nanobowl arrays, and (c) after the dettachment of the tape from the TiO2 nanobowl arrays.
S8
Figure S8. TiO2 nanobowl arrays immersed in various solvents; (a) water, (b) 1 M NaCl, (c) 1 M HNO3, (d) 1 M NaOH, (e) ethanol, (f) acetone, (g) benezene, and (h) toluene.
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