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2. 3D Printed Multilayer Structures for High Numerical Aperture Achromatic Metalenses

Author

Pan, Cheng-Feng, Wang, Hao, Wang, Hongtao, S, Parvathi Nair, Ruan, Qifeng, Wredh, Simon, Ke, Yujie, Chan, John You En, Zhang, Wang, Qiu, Cheng-Wei, and Yang, Joel K. W.

Subjects
Physics - Optics, Physics - Applied Physics
Abstract

Flat optics consisting of nanostructures of high-refractive-index materials produce lenses with thin form factors that tend to operate only at specific wavelengths. Recent attempts to achieve achromatic lenses uncover a trade-off between the numerical aperture (NA) and bandwidth, which limits performance. Here we propose a new approach to design high NA, broadband and polarization-insensitive multilayer achromatic metalenses (MAM). We combine topology optimization and full wave simulations to inversely design MAMs and fabricate the structures in low-refractive-index materials by two-photon polymerization lithography. MAMs measuring 20 micrometer in diameter operating in the visible range of 400-800 nm with 0.5 NA and 0.7 NA were achieved with efficiencies of up to 42%. We demonstrate broadband imaging performance of the fabricated MAM under white light, and RGB narrowband illuminations. These results highlight the potential of the 3D printed multilayer structures for realizing broadband and multi-functional meta-devices with inverse design., Comment: 37 pages, 15 figures

Published
2023

6. Exploratory analysis of the association between organophosphate ester mixtures with high blood pressure of children and adolescents aged 8–17 years: cross-sectional findings from the National Health and Nutrition Examination Survey

Author

Guo, Xianwei, Ke, Yujie, Wu, Birong, Song, Qiuxia, Sun, Chenyu, Li, Yaru, Wang, Hao, Su, Wanying, Liang, Qiwei, Lowe, Scott, Bentley, Rachel, Song, Evelyn J., King, Bethany, Zhou, Qin, Xie, Ruijin, and Deng, Fang

Published
2023
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9. A splice-switch oligonucleotide loaded self-cleavable DNA nanogel.

Author

Hu, Yuwei, Chen, Feng, Lu, Hongfang, Tan, Susi, Ke, Yujie, Loh, Wei Wei, Soh, Eugene Jia Hao, Taniya, Agarwal, Tabaglio, Tommaso, Wee, Dave Keng Boon, and Ying, Jackie Y.

Subjects
DNA
Abstract

A self-cleavable DNA nanogel loaded with splice-switch oligonucleotide (SSO) has been developed. Under acidic conditions (pH 5.0), cleavage of the acid-labile chemical linker and generation of the i-motif structure led to the disintegration of the DNA nanogel and efficient release of SSO in its unaltered native state. [ABSTRACT FROM AUTHOR]

Published
2024
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14. BLADE-ON-PETIOLE interacts with CYCLOIDEA to fine-tuneCYCLOIDEA-mediated flower symmetry in Monkeyflowers (Mimulus)

Author

Gao, Yuan, primary, Li, Jingjian, additional, He, Jiayue, additional, Yu, Yaqi, additional, Qian, Zexin, additional, Geng, Zhiqiang, additional, Yang, Liuhui, additional, Zhang, Yumin, additional, Ke, Yujie, additional, Lin, Qiaoshan, additional, Wang, Jing, additional, Chen, Sumei, additional, Chen, Fadi, additional, Yuan, Yao-Wu, additional, and Ding, Baoqing, additional

Published
2024
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18. The Breakdown of Blood‐Labyrinth Barrier Makes it Easier for Drugs to Enter the Inner Ear.

Author

Ke, Yujie, Ma, Xin, Jing, Yuanyuan, Diao, Tongxiang, and Yu, Lisheng

Abstract

Purpose: This study aimed to investigate dynamic change of permeability of blood‐labyrinth barrier (BLB) after noise exposure and its effect on the drug delivery efficiency of systemic administration. Methods: Gadopentetate dimeglumine (Gd‐DTPA) and dexamethasone (DEX) were used as tracers, and magnetic resonance imaging (MRI) and immunofluorescence were used to observe the change of the BLB after strong noise exposure in guinea pigs. High‐performance liquid chromatography‐mass spectrometry (LC–MS) was used to observe the effect of the breakdown of BLB after noise exposure on the drug delivery efficiency of intravenous DEX. The guinea pigs were divided into 6 groups: normal group (N), 1, 3, 5, 8, and 12 days after noise exposure groups (P1, P3, P5, P8, P12), with 5 animals in each group. Results: The BLB changes dynamically after noise exposure. Increased permeability of the blood‐endolymph barrier, the endolymph‐perilymph barrier, and the blood‐nerve barrier was observed at days 1–3, 1–5, and 1–8, respectively, after noise exposure in guinea pigs. Higher drug concentration in the cochlear tissue was obtained by intravenous administration of DEX in guinea pigs during the time window of increased permeability of the BLB. Conclusion: After noise exposure, the increased BLB permeability makes it easier for drugs to enter the inner ear from blood. In guinea pigs, 1–8 days after strong noise exposure, the drug delivery efficiency of systemic administration increased. After 8 days, the efficiency gradually returned to normal level. 1–8 days after noise exposure may be the best intervention time for systemic administration. Level of Evidence: NA Laryngoscope, 134:2377–2386, 2024 [ABSTRACT FROM AUTHOR]

Published
2024
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28. A pH‐Cascaded DNA Hydrogel Mediated by Reconfigurable A‐motif Duplex, i‐Motif Quadruplex, and T·A‐T Triplex Structures.

Author

Hu, Yuwei, Ke, Yujie, and Willner, Itamar

Subjects
*HYDROGELS, *DNA, *DNA structure, *THYMINE, *PROTON transfer reactions, *ADENINE, *QUADRUPLEX nucleic acids, *CYTOSINE
Abstract

Governed by pH‐configurable A‐motif, i‐motif and T·A‐T triplex configurations, a cascaded DNA hydrogel subjecting to diverse pH values is presented. Under highly acidic conditions (pH 1.1), N1 protonation of adenine (pKa 3.5) in A‐strands generates AH+‐H+A units, resulting in a parallel A‐motif duplex crosslinked hydrogel. Under mild acid conditions (pH 5.2), the dissociation of A‐motif duplex into single A‐strands occurs due to the deprotonation of adenine, while N3 protonation of cytosine (pKa 6.5) in C‐strands creates hemi‐protonated C:C+ units, resulting in i‐motif bridged hydrogel. At neutral pH (pH 7.2), deprotonation of cytosine separates i‐motif crosslinkers. Simultaneously, the addition of auxiliary T‐strands results in the N3 protonation of thymine (pKa 10), generating T·A‐T triplex stabilized hydrogel. Under mildly alkaline conditions (pH 10.2), T·A‐T triplex separates into single T‐stands and A‐T duplex, resulting in the disassembly of DNA hydrogel. Therefore, a stepwise pH‐cascaded DNA hydrogel dictates the formation of structures following the pH steps 1.1 → 5.2 → 7.2 → 10.2 where pH‐triggered DNA secondary structures, including A‐motif, i‐motif and T·A‐T triplex, stabilize the hydrogel. The study advances DNA hydrogels from single pH‐responsiveness to multiple cascaded pH values, which opens up new possibilities for the development of smart hydrogels capable of adapting to various environmental conditions. [ABSTRACT FROM AUTHOR]

Published
2023
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30. Two‐Photon Polymerization Lithography for Optics and Photonics: Fundamentals, Materials, Technologies, and Applications

Author

Wang, Hao, primary, Zhang, Wang, additional, Ladika, Dimitra, additional, Yu, Haoyi, additional, Gailevičius, Darius, additional, Wang, Hongtao, additional, Pan, Cheng‐Feng, additional, Nair, Parvathi Nair Suseela, additional, Ke, Yujie, additional, Mori, Tomohiro, additional, Chan, John You En, additional, Ruan, Qifeng, additional, Farsari, Maria, additional, Malinauskas, Mangirdas, additional, Juodkazis, Saulius, additional, Gu, Min, additional, and Yang, Joel K. W., additional

Published
2023
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34. Exploratory analysis of the association between organophosphate ester mixtures with high blood pressure of children and adolescents aged 8–17 years: cross-sectional findings from the National Health and Nutrition Examination Survey

Author

Guo, Xianwei, primary, Ke, Yujie, additional, Wu, Birong, additional, Song, Qiuxia, additional, Sun, Chenyu, additional, Li, Yaru, additional, Wang, Hao, additional, Su, Wanying, additional, Liang, Qiwei, additional, Lowe, Scott, additional, Bentley, Rachel, additional, Song, Evelyn J., additional, King, Bethany, additional, Zhou, Qin, additional, Xie, Ruijin, additional, and Deng, Fang, additional

Published
2022
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38. Anisotropic localized surface plasmon resonance of vanadium dioxide rods in flexible thermochromic film towards multifunctionality

Author

Xu, Qiyang, primary, Ke, Yujie, additional, Feng, Chengchen, additional, Chen, Cong, additional, Wen, Zuohao, additional, Wang, Haoran, additional, Sun, Miaoyang, additional, Liu, Xinghai, additional, Liu, Hai, additional, Magdassi, Shlomo, additional, Li, Houbin, additional, Huang, Chi, additional, and Long, Yi, additional

Published
2021
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44. Smart Windows: 3D Printed Smart Windows for Adaptive Solar Modulations (Advanced Optical Materials 11/2020)

Author

Zhou, Chengzhi, primary, Li, Dan, additional, Tan, Yutong, additional, Ke, Yujie, additional, Wang, Shancheng, additional, Zhou, Yang, additional, Liu, Guowei, additional, Wu, Shaofan, additional, Peng, Jinqing, additional, Li, Anran, additional, Li, Shuzhou, additional, Chan, Siew Hua, additional, Magdassi, Shlomo, additional, and Long, Yi, additional

Published
2020
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46. Largely lowered transition temperature of a VO2/carbon hybrid phase change material with high thermal emissivity switching ability and near infrared regulations

Author

Wang, Shancheng, Liu, Guowei, Hu, Peng, Zhou, Yang, Ke, Yujie, Li, Chuanchang, Chen, Jian, Cao, Tun, Long, Yi, School of Materials Science & Engineering, Campus for Research Excellence and Technological Enterprise (CREATE), Singapore-HUJ Alliance for Research and Enterprise (SHARE), and Nanomaterials for Energy and Energy-Water Nexus (NEW)

Subjects
Camouflage, Materials [Engineering], Hybrid Materials
Abstract

Vanadium oxide (VO2) as a phase changing material possesses abrupt infrared (IR) transmission and thermal emissivity changing during the metal–insulator transition across transition temperature (τc) of 68 °C. However, the high τc, moderate IR transmission and emissivity regulating ability limits its applications in various fields. A VO2/carbon hybrid phase change material fabricated via homemade plasma enhanced chemical vapor deposition is reported. The material shows a best reported thermal emissivity contrast (0.44) among the experimental values, a largely lowered τc (45 °C), promising a near IR-regulation ability with enhanced photothermal effect in smart windows applications. The theoretical calculation results proved that the improvement of emissivity contrast is due to the hybridization of carbon. This work provides a new approach to synthesize VO2 hybrid materials, which have wide applications in camouflage, sensing, and smart windows. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version

Published
2018

50. Agent-assisted VSSe ternary alloy single crystals as an efficient stable electrocatalyst for the hydrogen evolution reaction

Author

Hu, Peng, primary, Long, Guankui, additional, Chaturvedi, Apoorva, additional, Wang, Shancheng, additional, Tan, Kejie, additional, He, Yongming, additional, Zheng, Lu, additional, Liu, Guowei, additional, Ke, Yujie, additional, Zhou, Yang, additional, Jiang, Hui, additional, Liu, Zheng, additional, Zhang, Mingtao, additional, and Long, Yi, additional

Published
2019
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