Materials Horizons最新文献_第2页

A streamlined algorithm for two-dimensional bandgaps and defect-state energy variations in InGaN-based micro-LEDs. 基于 InGaN 的微型 LED 中二维带隙和缺陷态能量变化的简化算法。

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-17 DOI: 10.1039/d4mh01149j

Dong-Su Ko, Sihyung Lee, Jinjoo Park, Soohwan Sul, Changhoon Jung, Dong-Jin Yun, Mi Kyung Kim, Jaewoo Lee, Jun Hee Choi, Seong Yong Park, Munbo Shim, Won-Joon Son, Se Yun Kim

{"title":"A streamlined algorithm for two-dimensional bandgaps and defect-state energy variations in InGaN-based micro-LEDs.","authors":"Dong-Su Ko, Sihyung Lee, Jinjoo Park, Soohwan Sul, Changhoon Jung, Dong-Jin Yun, Mi Kyung Kim, Jaewoo Lee, Jun Hee Choi, Seong Yong Park, Munbo Shim, Won-Joon Son, Se Yun Kim","doi":"10.1039/d4mh01149j","DOIUrl":"https://doi.org/10.1039/d4mh01149j","url":null,"abstract":"Bandgaps and defect-state energies are key electrical characteristics of semiconductor materials and devices, thereby necessitating nanoscale analysis with a heightened detection threshold. An example of such a device is an InGaN-based light-emitting diode (LED), which is used to create fine pixels in augmented-reality micro-LED glasses. This process requires an in-depth understanding of the spatial variations of the bandgap and its defect states in the implanted area, especially for small-sized pixelation requiring electroluminescence. In this study, we developed a new algorithm to achieve two-dimensional mappings of bandgaps and defect-state energies in pixelated InGaN micro-LEDs, using automated electron energy-loss spectroscopy integrated with scanning transmission electron microscopy. The algorithm replaces conventional background subtraction-based methods with a linear fitting approach, enabling enhanced accuracy and efficiency. This novel method offers several advantages, including the independent calculation of the defect energy (Ed) and bandgap energy (Eg), reduced thickness effects, and improved signal-to-noise ratio by eliminating the need for zero-loss spectrum calibration. These advancements allow us to reveal the relationship between the bandgap, defect states, microstructure, and electroluminescence of the semiconductor under ion-implantation conditions. The streamlined analysis achieves a spatial resolution of approximately 5 nm and an exceptional detection limit. Additionally, ab initio calculations indicate gallium vacancies as the predominant defects.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reversal of chirality in solutions and aggregates of chiral tetrachlorinated diperylene diimides towards efficient circularly polarized light detection. 手性四氯二亚甲基二酰亚胺溶液和聚合体中的手性逆转，实现高效圆偏振光检测。

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-17 DOI: 10.1039/d4mh01435a

Ke Gao, Sang Hyuk Lee, Wenkai Zhao, Jaeyong Ahn, Tae Woo Kim, Zhenping Li, Huagui Zhuo, Zhiwei Wang, Xinglong Zheng, Yang Yan, Gang Chang, Wei Ma, Mingming Zhang, Guankui Long, Joon Hak Oh, Xiaobo Shang

{"title":"Reversal of chirality in solutions and aggregates of chiral tetrachlorinated diperylene diimides towards efficient circularly polarized light detection.","authors":"Ke Gao, Sang Hyuk Lee, Wenkai Zhao, Jaeyong Ahn, Tae Woo Kim, Zhenping Li, Huagui Zhuo, Zhiwei Wang, Xinglong Zheng, Yang Yan, Gang Chang, Wei Ma, Mingming Zhang, Guankui Long, Joon Hak Oh, Xiaobo Shang","doi":"10.1039/d4mh01435a","DOIUrl":"https://doi.org/10.1039/d4mh01435a","url":null,"abstract":"Helicenes exhibit promise as active layer materials for circularly polarized light (CPL) detectors due to their strong chiroptical activity. However, their practical application is limited by the complicated synthesis and loosely solid-state packing. This study introduces a chiral induction strategy towards the synthesis of helicene derivatives, chiral tetrachlorinated diperylene diimides ((SSSS)-4CldiPDI or (RRRR)-4CldiPDI). When incorporating the chiral (S/R)-1-cyclohexylethyl (Cy) substituents, the chirality is directly transferred to the π-aromatic core and forms the PP- or MM-helicene subunit. Notably, (SSSS)-Cy induces preferred PP helicity while (RRRR)-Cy leads to the MM helicity in the monomers. However, these molecules exhibit reversed chirality in crystals, where (SSSS)-Cy controls MM helicity and (RRRR)-Cy induces PP helicity. Theoretical calculations reveal that the (SSSS)-PP structure demonstrates lower energy distribution in monomers, whereas the (SSSS)-MM structure exhibits lower energy in crystals. Then, the CPL detection based on n-type PDI-helicene derivatives is achieved by using (SSSS)-4CldiPDI or (RRRR)-4CldiPDI crystals. The maximum photocurrent dissymmetry factor gph of +0.16 for (RRRR)-4CldiPDI and -0.15 for (SSSS)-4CldiPDI is obtained. Our work demonstrates a novel chiral induction strategy for designing helicene-based materials with both high dissymmetry factor and large charge carrier mobility, which offers great potential for the advancement of CPL detection.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142833125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional transparent conductive films via Langmuir-Blodgett assembly of large MXene flakes.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-13 DOI: 10.1039/d4mh01450b

Jie Xue, Dan Liu, Chuanbing Li, Zifu Zhu, Yuxuan Sun, Xiaobo Gao, Qingbin Zheng

{"title":"Multifunctional transparent conductive films via Langmuir-Blodgett assembly of large MXene flakes.","authors":"Jie Xue, Dan Liu, Chuanbing Li, Zifu Zhu, Yuxuan Sun, Xiaobo Gao, Qingbin Zheng","doi":"10.1039/d4mh01450b","DOIUrl":"https://doi.org/10.1039/d4mh01450b","url":null,"abstract":"The rapid development of information technology has put forward new requirements for multifunctional properties of transparent conductive films (TCFs) beyond their excellent optoelectrical performance. Despite the recent progress in the preparation of multifunctional films composed of Ti3C2Tx MXenes, achieving highly uniform single-layer Ti3C2Tx MXene films (SLMFs) with continuous and dense conductive pathways to realize multifunctional TCFs (M-TCFs) remains a significant challenge. Here, the Langmuir-Blodgett (LB) technique is employed to assemble large Ti3C2Tx MXene (LM) flakes (∼52 μm2) into SLMFs with controlled stacking density and morphology, enabling the fabrication of M-TCFs with high conductivity and transparency simultaneously. The SLMFs assembled from LM flakes (L-SLMFs) not only exhibit balanced optical and electrical properties with a figure of merit of 9.67 (sheet resistance Rs = 318 Ω sq-1 at transmittance T = 88%) due to the close-packed morphology with significantly reduced inter-flake junctions, but also demonstrate excellent electrothermal conversion capability (105.5 °C within 40 s at 20 V when T = 75%) and remarkable absolute shielding effectiveness (up to 7.86 × 105 dB cm2 g-1 at T = 89%). The LB assembly approach provides a straightforward way to produce high-performance M-TCFs for next-generation electronic devices.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toughening hydrogels through a multiscale hydrogen bonding network enabled by saccharides for a bio-machine interface.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-13 DOI: 10.1039/d4mh01645a

Yuhang Ye, Xun Niu, Kelvin Zheng, Zhangmin Wan, Wucheng Zhang, Qi Hua, Jiaying Zhu, Zhe Qiu, Siheng Wang, He Liu, Scott Renneckar, Orlando Rojas, Feng Jiang

{"title":"Toughening hydrogels through a multiscale hydrogen bonding network enabled by saccharides for a bio-machine interface.","authors":"Yuhang Ye, Xun Niu, Kelvin Zheng, Zhangmin Wan, Wucheng Zhang, Qi Hua, Jiaying Zhu, Zhe Qiu, Siheng Wang, He Liu, Scott Renneckar, Orlando Rojas, Feng Jiang","doi":"10.1039/d4mh01645a","DOIUrl":"https://doi.org/10.1039/d4mh01645a","url":null,"abstract":"Hydrogels have considerably emerged in a variety of fields, but their weak mechanical properties severely restrict the wide range of implementation. Herein, we propose a multiscale hydrogen bonding toughening strategy using saccharide-based materials to optimize the hydrogel network. The monosaccharide (glucose) at the molecular scale and polysaccharide (cellulose nanofibrils) at the nano/micro scale can effectively form hydrogen bonds across varied scales within the hydrogel network, leading to significantly enhanced mechanical properties. Besides, the toughened hydrogels present excellent environmental resilience and bad solvent resistance, allowing them to retain their performance in various severe environments. Notably, after being exchanged with a bad solvent such as ethanol, the alcogel exhibits strain-depended vivid interference color, allowing it to function as a mechano-optical sensor. Finally, this strategy has been shown to be adaptable across multiple material systems, and the resulting hydrogels have potential as a bioelectronic interface for long-term stable recording of physiological signals, highlighting the potential of sustainable biomaterials in designing high-quality hydrogels for advanced applications.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142816643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Narrowband emission and enhanced stability in top-emitting OLEDs with dual resonant cavities.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-12 DOI: 10.1039/d4mh01561d

Wei He, Qi Sun, Zi-Yi Jin, Hao-Feng Zheng, Shuang-Qiao Sun, Jun-Gui Zhou, Shao-Cong Hou, Yue-Min Xie, Feiyu Kang, Guodan Wei, Man-Keung Fung

{"title":"Narrowband emission and enhanced stability in top-emitting OLEDs with dual resonant cavities.","authors":"Wei He, Qi Sun, Zi-Yi Jin, Hao-Feng Zheng, Shuang-Qiao Sun, Jun-Gui Zhou, Shao-Cong Hou, Yue-Min Xie, Feiyu Kang, Guodan Wei, Man-Keung Fung","doi":"10.1039/d4mh01561d","DOIUrl":"https://doi.org/10.1039/d4mh01561d","url":null,"abstract":"Capping layers (CPLs) are commonly employed in top-emitting organic light-emitting diodes (TEOLEDs) due to their ability to optimize color purity, enhance external light out-coupling efficiency, and improve device stability. However, the mismatch in refractive index between CPLs and thin film encapsulation (TFE) often induces light trapping. This study introduces a novel approach by combining a low refractive index material, lithium fluoride (LiF), with the traditional TFE material, silicon nitride (SiNx), to form a combined CPL (LiF/SiNx), resulting in improved light outcoupling and light reflection properties. The significant refractive index contrast between LiF and SiNx can facilitate enhanced light extraction by redirecting internally reflected light through evanescent waves. Moreover, the LiF/SiNx CPLs function as a secondary resonant cavity, leading to reduced emission spectral bandwidth and enhanced light extraction compared to the control TEOLEDs that only incorporate the primary cavity of organic active layers. As a result, incorporating the LiF/SiNx CPLs significantly increases current efficiency from 125.0 cd A-1 to 163.6 cd A-1 for green devices, from 71.2 cd A-1 to 110.1 cd A-1 for red devices, and from 43.1 cd A-1 to 53.1 cd A-1 for blue devices, with the corresponding full width at half maximum decreased from 20 nm to 10 nm, 26 nm to 14 nm, and 21 nm to 12 nm, respectively, demonstrating the compatibility of the CPLs with different color devices. Notably, an LT95 lifetime of 51 300 hours for green devices was achieved when tested at 1000 cd m-2. Utilizing narrow-band light emission without spectral overlap of each color enables the generation of purer and more vivid colors for display.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Looking back at the Materials Horizons 10th anniversary.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-12 DOI: 10.1039/d4mh90137a

引用次数: 0

Multi-gradient energy-saving smart windows with thermo-response and multimodal thermal energy storage.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-12 DOI: 10.1039/d4mh01259c

Yang Zhou, Yiqi He, Sisi Zhao, Simeng Qi, Lulu Wang, Yingchun Niu, Quan Xu, Chunming Xu, Juncheng Wang

{"title":"Multi-gradient energy-saving smart windows with thermo-response and multimodal thermal energy storage.","authors":"Yang Zhou, Yiqi He, Sisi Zhao, Simeng Qi, Lulu Wang, Yingchun Niu, Quan Xu, Chunming Xu, Juncheng Wang","doi":"10.1039/d4mh01259c","DOIUrl":"https://doi.org/10.1039/d4mh01259c","url":null,"abstract":"Buildings, especially installed windows, account for a large proportion of global energy consumption. The research trend of smart windows leans towards multi-functional integration, concurrently achieving solar modulation and thermal management. However, sometimes a one-time performance switch cannot meet demands, making the design of multi-gradient adjustable smart windows particularly important. The combination of the temperature-responsive optical properties of hydroxypropyl cellulose (HPC), the high specific heat capability of water (sensible heat storage) and the solid-liquid phase transition of κ-carrageenan (latent heat storage) is proposed first and can be used to prepare the thermo-responsive hydrogel and multi-gradient energy-saving smart window with thermo-response and multimodal thermal energy storage (MGES smart window) quickly without long-term polymerization. The MGES smart window has excellent solar modulation capability (ΔTlum = 82.72% and ΔTsol = 68.65%) together with outstanding specific heat absorption ability (c = 4.2 kJ kg-1 K-1) and phase transition heat (ΔH = 1.23 kJ kg-1), showing superior energy saving and conserving performance. In demonstrations, the MGES smart windows can reduce the surface and indoor temperature by more than 15 °C and 10.6 °C compared with normal windows. Simulations suggest that they can cut off 45.1% of building energy consumption. To sum up, the MGES smart windows realize multi-aspect adjustment of energy, opening up a new avenue for green buildings.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solution-processed spin organic light-emitting diodes based on antisolvent-treated 2D chiral perovskites with strong spin-dependent carrier transport.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-12 DOI: 10.1039/d4mh01371a

Lan-Sheng Yang, Chun-Yao Huang, Chin-An Hsu, Sih-Tong Lin, Yun-Shan Hsu, Chia-Hsiang Chuang, Pei-Hsuan Lo, Yu-Chiang Chao

{"title":"Solution-processed spin organic light-emitting diodes based on antisolvent-treated 2D chiral perovskites with strong spin-dependent carrier transport.","authors":"Lan-Sheng Yang, Chun-Yao Huang, Chin-An Hsu, Sih-Tong Lin, Yun-Shan Hsu, Chia-Hsiang Chuang, Pei-Hsuan Lo, Yu-Chiang Chao","doi":"10.1039/d4mh01371a","DOIUrl":"https://doi.org/10.1039/d4mh01371a","url":null,"abstract":"Chiral perovskites, which are applied to spin organic light-emitting diodes as a spin-induced spin selectivity (CISS) layer, have attracted increasing amounts of attention. A device based on a thicker perovskite CISS layer leads to strongly spin-polarized EL emission. However, chiral perovskite films suffer from poor device performance due to difficulties in carrier injection and film quality. The effects of antisolvent dripping on the chiroptical properties of chiral perovskite films were investigated. The rapid crystallization of chlorobenzene (CB)-treated films generated a high-quality film with fewer halide vacancies and a much greater strength of asymmetric hydrogen bonding. Accordingly, the inorganic structural distortion is greater, resulting in greater chiroptical activity. The chiral perovskite thickness affects the circularly polarized electroluminescence (CP-EL) of spin-OLEDs. The statistics relating device performance and thickness are presented. The spin current polarization degree of chiral perovskites reaches approximately 86%. The maximum CP-EL asymmetry factor (g CP-EL) is 2.6 × 10-2 and maximum external quantum efficiency (EQE) of the spin-OLED device is 3.68%. Spin OLED devices based on chiral perovskites can be manipulated and controlled by thickness and antisolvent treatment. gCPEL intensities for devices based on CB-treated chiral perovskite films can be increased by about 1.75 times compared with devices based on untreated films.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accelerated design of solid bio-based foams for plastics substitutes.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-12 DOI: 10.1039/d4mh01464b

Isaac Y Miranda-Valdez, Tero Mäkinen, Sebastian Coffeng, Axel Päivänsalo, Luisa Jannuzzi, Leevi Viitanen, Juha Koivisto, Mikko J Alava

{"title":"Accelerated design of solid bio-based foams for plastics substitutes.","authors":"Isaac Y Miranda-Valdez, Tero Mäkinen, Sebastian Coffeng, Axel Päivänsalo, Luisa Jannuzzi, Leevi Viitanen, Juha Koivisto, Mikko J Alava","doi":"10.1039/d4mh01464b","DOIUrl":"https://doi.org/10.1039/d4mh01464b","url":null,"abstract":"Biobased substitutes for plastics are a future necessity. However, the design of substitute materials with similar or improved properties is a known challenge. Here we show an example case of optimizing the mechanical properties of a fully biobased methylcellulose-fiber composite material. We tackle the process-structure-property paradigm using Bayesian optimization with Gaussian process regression to map the processed material composition to the final mechanical properties of new bio-based solid foams. We exploited the fast-to-measure rheological properties of the liquid biofiber suspensions processed into foams to show how these collapse to an auxiliary sub-space of low dimensionality for design. The optimal compositions for methylcellulose-fiber foams shown here correspond to two distinct cases: high methylcellulose content for the formation of strong closed-cell foams, and high fiber contents with approximately equal amounts of methylcellulose for the formation of methylcellulose-bound fiber networks. The novel approach is transferable to other biobased foam compositions with different fibers and additives. This new approach allows the rational design of bio-based plastics replacements by encompassing desired final material properties, descriptors of materials processed, and knowledge of the process.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid 3D printing of unlayered, tough epoxy-alcohol resins with late gel points via dual-color curing technology.

IF 12.2 2区材料科学

Materials Horizons Pub Date : 2024-12-12 DOI: 10.1039/d4mh01261e

Florian Mayer, Dominik Laa, Thomas Koch, Jürgen Stampfl, Robert Liska, Katharina Ehrmann

{"title":"Rapid 3D printing of unlayered, tough epoxy-alcohol resins with late gel points via dual-color curing technology.","authors":"Florian Mayer, Dominik Laa, Thomas Koch, Jürgen Stampfl, Robert Liska, Katharina Ehrmann","doi":"10.1039/d4mh01261e","DOIUrl":"https://doi.org/10.1039/d4mh01261e","url":null,"abstract":"Additive manufacturing technologies and, in particular, vat photopolymerization promise complex structures that can be made in a fast and easy fashion for highly individualized products. While the technology has upheld this promise many times already, some polymers are still out of reach or at least problematic to print reliably. High-performance epoxide-based resins, which are regulated by chain transfer via multifunctional alcohols, are a typical example of resins with late gel points, which require long irradiation times and high light intensities to print. Therefore, we have developed a dual-colour printing approach where rapid radical curing of a soft, wide-meshed polymer network facilitates fast and easy 3D structuring of the subsequently slow curing step-growth formulation at an orthogonal initiation-wavelength regime. Thereby the methacrylate system acts as a scaffold for an uncured epoxide alcohol system during the printing process, which is then cured with UV light post-printing. This way tough alcohol-regulated epoxy-systems become accessible to vat photopolymerization achieving outstanding high-resolution 3D printed parts without significant layering effects. The demonstrated wide-meshed matrix-assisted printing approach has the potential to make a multitude of slowly curing resins accessible to vat photopolymerization techniques, at low irradiation intensities and high curing speeds.","PeriodicalId":87,"journal":{"name":"Materials Horizons","volume":" ","pages":""},"PeriodicalIF":12.2,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0