IF 7 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-05-22 DOI: 10.1016/j.giant.2024.100290

Conglong Yuan , Yuxing Zhan , Huixian Liu , Zhaoyi Wang , Ning Shen , Binghui Liu , Honglong Hu , Zhigang Zheng

{"title":"Room temperature stable twist-bend nematic materials without crystallization over 1 year","authors":"Conglong Yuan , Yuxing Zhan , Huixian Liu , Zhaoyi Wang , Ning Shen , Binghui Liu , Honglong Hu , Zhigang Zheng","doi":"10.1016/j.giant.2024.100290","DOIUrl":"10.1016/j.giant.2024.100290","url":null,"abstract":"<div><p>The twist-bend nematic (N<sub>TB</sub>) phase of achiral liquid crystals (LCs) manifests a unique self-assembled heliconical structure with nanometer-scale pitch length, mirroring the chiral symmetry-breaking phenomena in nature, thus sparking widespread research interest. However, the ingenious N<sub>TB</sub> phase is only stable at high temperatures within a very limited temperature interval, often undergoing inevitable crystallization at low temperatures. Herein, room temperature supercooled N<sub>TB</sub> material systems composed of meticulously designed LC dimer mixtures with varying molecular curvatures and central flexibility were developed, resulting in complete resistance to crystallization even after 1 year of storage. Furthermore, the proposed N<sub>TB</sub> material systems demonstrated exceptional compatibility with common nematic LCs, facilitating the tailoring of overall physical parameters, particularly to achieve a sufficiently low bend elastic constant with excellent stability. This work represents a paradigmatic advancement forward in realizing stable N<sub>TB</sub> phase materials with a broad temperature range and resistance to crystallization, thereby tackling the enduring and seemingly insurmountable challenge while providing impetus for further exploration of their applications in soft matter, crystallography, and advanced photonics.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100290"},"PeriodicalIF":7.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000547/pdfft?md5=ffedc8eea5fda2ed3e0b8c09e2c5379d&pid=1-s2.0-S2666542524000547-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141141847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phase Behavior of Sugar-based Block Co-oligomer Modulated by Molecular Chirality 分子手性调控糖基嵌段共聚物的相行为

IF 5.4 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-06-14 DOI: 10.1016/j.giant.2024.100308

Kai Chen , Chaehun Lee , Chun-Yu Chen , Toshifumi Satoh , Takuya Isono , Hsin-Lung Chen

{"title":"Phase Behavior of Sugar-based Block Co-oligomer Modulated by Molecular Chirality","authors":"Kai Chen , Chaehun Lee , Chun-Yu Chen , Toshifumi Satoh , Takuya Isono , Hsin-Lung Chen","doi":"10.1016/j.giant.2024.100308","DOIUrl":"10.1016/j.giant.2024.100308","url":null,"abstract":"<div><p>Sugar-based block co-oligomer (BCO) consisting of saccharide block exhibits high segregation strength that overcomes the limitation of the traditional block copolymers for accessing the ordered nanostructures with ultrasmall feature size. This study explores the influence of molecular chirality on the self-assembly behavior of glucose-<em>block</em>-tocopherol (Glc-<em>b</em>-Toc) BCOs, wherein the Toc blocks were either pure in chirality or being a mixture of the stereoisomers. Both the chiral and racemic BCOs formed a hexagonal perforated layer (HPL) structure with an unusually small aspect ratio (<em>c/a)</em> of the unit cell, attributable to the propensity of the Glc block to enhance hydrogen bonding formation. As the temperature was increased, the dominance of hydrogen bonding interactions diminished, resulting in a gradual increase in the <em>c/a</em> ratio and eventually a transformation of the HPL structure to a double gyroid (DG) phase. The chirality of the Toc block enhanced the effective segregation strength of the BCO, leading to elevated order-order transition temperatures associated with the HPL-to-DG and DG-to-hexagonally packed cylinder (HEX) transitions. Within the HPL phase window, the chiral BCO exhibited significantly slower kinetics during thermally-induced structural reorganization in adjusting the <em>c/a</em> ratio, especially in the cooling process. Consequently, a pronounced hysteresis in the structural reorganization of the chiral BCO was observed. This phenomenon was ascribed to the chiral interaction between the Toc blocks, which limited the diffusion of the BCO molecules for the structural reorganization.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100308"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000729/pdfft?md5=57b1910e7d0e584b5ba3d537f557af94&pid=1-s2.0-S2666542524000729-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141394526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Converting “sliding” to “rolling” design for high-performance lubricating hydrogel 将高性能润滑水凝胶的 "滑动 "设计转变为 "滚动 "设计

IF 7 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-05-29 DOI: 10.1016/j.giant.2024.100296

Fangbin Fan , Jinrui Han , Li Zhao , Bo Yu , Meirong Cai , Xiaowei Pei , Zhizhi Zhang , Shuanhong Ma , Yanfei Ma , Feng Zhou

{"title":"Converting “sliding” to “rolling” design for high-performance lubricating hydrogel","authors":"Fangbin Fan , Jinrui Han , Li Zhao , Bo Yu , Meirong Cai , Xiaowei Pei , Zhizhi Zhang , Shuanhong Ma , Yanfei Ma , Feng Zhou","doi":"10.1016/j.giant.2024.100296","DOIUrl":"https://doi.org/10.1016/j.giant.2024.100296","url":null,"abstract":"<div><p>Despite the excellent lubricity of conventional hydrogel materials due to their wet-soft properties, they produce severe mechanical elastic deformation at higher interfacial contact stresses. Balancing the load-bearing capacity and lubricating properties of hydrogel material is the difficulty of the current research work for articular cartilage substitutes. Great progress has been made in developing bionic joint materials with high load-bearing and low-friction hydrogels based on gradient designs. However, most bionic materials are based on sliding friction greatly limiting the improvement of lubrication performance. Herein, we designed and prepared a new hydrogel material with high load-bearing capacity and stable lubrication performance, breaking through the traditional friction method and turning to “sliding” for “rolling”. The network on the hydrogel surface was dissociated by UV irradiation and the pores on the surface were filled with SiO<sub>2</sub> nanoparticles. The dense network structure of the underlying layer endows the hydrogel material with good load-bearing properties, while the high degree of hydration of the surface layer and the rolling friction effect of SiO<sub>2</sub> nanoparticles greatly enhance the lubrication property. With the synergistic effect of these designs, the multi-layered hydrogel with nanoparticles on the surface achieved an ultra-low average coefficient of friction (COF) of ∼0.00809 at a high load of 50 N during 30,000 cycles. This idea of hydrogel material design provides a new strategy for the replacement of biomimetic articular cartilage materials.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100296"},"PeriodicalIF":7.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000602/pdfft?md5=9e948d92c08290c6a4a291f202e87a66&pid=1-s2.0-S2666542524000602-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141263810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Progress in biomaterials inspired by the extracellular matrix 受细胞外基质启发的生物材料研究进展

IF 5.4 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-07-10 DOI: 10.1016/j.giant.2024.100323

Zhuolin Chen , Chengcheng Du , Senrui Liu, Jiacheng Liu, Yaji Yang, Lili Dong, Weikang Zhao, Wei Huang, Yiting Lei

{"title":"Progress in biomaterials inspired by the extracellular matrix","authors":"Zhuolin Chen , Chengcheng Du , Senrui Liu, Jiacheng Liu, Yaji Yang, Lili Dong, Weikang Zhao, Wei Huang, Yiting Lei","doi":"10.1016/j.giant.2024.100323","DOIUrl":"10.1016/j.giant.2024.100323","url":null,"abstract":"<div><p>Inspired by the extracellular matrix (ECM), biomaterials have emerged as promising strategies in the biomedical research and engineering domain, offering unique characteristics for tissue regeneration, drug delivery, therapeutic interventions, and cellular investigations. The ECM, a dynamic network structure secreted by various cells, primarily comprises diverse proteins capable of facilitating tissue-ECM signaling and regulatory functions through its rich array of bioactive substances and multi-level structural properties. Drawing inspiration from the intricate structure and biochemical composition of natural ECM, researchers have developed various biomaterials to encapsulate these features and create biomimetic microenvironments, such as electrospinning, hydrogels/hydrogel microspheres, decellularized ECM(dECM), and ECM-mimicking peptides. Furthermore, by mimicking the structural composition of ECM components, ECM-inspired biomaterials exhibit varying degrees of ECM functionalization, including providing structural support, cell adhesion, signal transduction, mitigating immune responses, and tissue remodeling. In summary, the advancements in ECM-inspired biomaterials offer significant promise in addressing key challenges in the fields of tissue engineering, regenerative medicine, and drug delivery.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100323"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000870/pdfft?md5=ade9827ef2395fc5734a2ad74b8b445c&pid=1-s2.0-S2666542524000870-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141698784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

n-Type polythiophene as a hole-blocking layer in inverted organic photodetectors 在倒置有机光电探测器中用作空穴阻挡层的 n 型聚噻吩

IF 7 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-05-28 DOI: 10.1016/j.giant.2024.100291

Jiahui Wang , Sihui Deng , Jun Ma , Junli Hu , Jun Liu

{"title":"n-Type polythiophene as a hole-blocking layer in inverted organic photodetectors","authors":"Jiahui Wang , Sihui Deng , Jun Ma , Junli Hu , Jun Liu","doi":"10.1016/j.giant.2024.100291","DOIUrl":"https://doi.org/10.1016/j.giant.2024.100291","url":null,"abstract":"<div><p>Organic photodetectors (OPDs) own unique advantages such as light weight, flexibility, low production cost, tunable detection wavelength, and thus are promising for a variety of applications. The lack of hole-blocking layer (HBL) materials impedes the reduction of dark current density and the enhancement of the performance of OPDs. Herein, we employed an n-type polythiophene n-PT1 as a HBL material for inverted OPDs. The specific solubility of n-PT1 in <em>o</em>-dichlorobenzene facilitates solution processing and enables multilayer device fabrication. The ultradeep-lying highest occupied molecular orbital energy level ensures a large hole injection barrier between cathode and active layer that suppresses dark current. As a result, compared to the control devices without n-PT1, the inverted OPD devices with n-PT1 as HBL demonstrate a two-order-of-magnitude reduction in dark current density and a one-order-of-magnitude increase in specific detectivity. To the best of our knowledge, this is the first solution processable HBL material for inverted OPDs.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100291"},"PeriodicalIF":7.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000559/pdfft?md5=00a8df932071896f4695480d271d09fc&pid=1-s2.0-S2666542524000559-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141263900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Skin-like breathable wound dressings with antimicrobial and hemostatic properties 具有抗菌和止血功能的类肤透气伤口敷料

IF 7 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-06-03 DOI: 10.1016/j.giant.2024.100300

Hanbai Wu , Chuanwei Zhi , Yuhan Chen , Xiong Zhou , Cong Wang , Raymond H.W. Lam , Tingwu Qin , Guibing Fu , Zhu Xiong , Kaisong Huang , Jia-Horng Lin , Shuo Shi , Jinlian Hu

{"title":"Skin-like breathable wound dressings with antimicrobial and hemostatic properties","authors":"Hanbai Wu , Chuanwei Zhi , Yuhan Chen , Xiong Zhou , Cong Wang , Raymond H.W. Lam , Tingwu Qin , Guibing Fu , Zhu Xiong , Kaisong Huang , Jia-Horng Lin , Shuo Shi , Jinlian Hu","doi":"10.1016/j.giant.2024.100300","DOIUrl":"10.1016/j.giant.2024.100300","url":null,"abstract":"<div><p>Wound healing requires a contamination-free, sterile, and breathable environment. However, to develop an ideal wound dressing with all these functionalities simultaneously poses significant challenges. In this study, we designed a wound dressing that mimics the structure of skin with good breathability and protective functions. The wound dressing consists of a hydrophilic Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P34HB) membrane coated with zinc oxide nanoparticles and a hydrophobic polyvinylidene fluoride (PVDF) membrane. Meanwhile, plasma treatment was also utilized to bond the two layers, resulting in an enhancement of 60 % in mechanical properties. The crosslinked fibrous membranes exhibited uniform stress distribution when stretching. Due to the unique structures of the wound dressing, it demonstrates wound exudate management, antibacterial functions, and hemostatic properties. The hydrophobic layer guided wound exudate towards the hydrophilic layer and the zinc oxide nanoparticles acted as a barrier against external bacteria and released zinc ions to inhibit bacterial growth in the exudate. Moreover, the water vapor transmission rate (WVTR) was measured to be over 86.55 kg/m<sup>2</sup>/day, the hemolysis rate was 2.38 %, and an impressive 81.98 % healing rate was recorded during in vitro wound healing. This skin-mimicking wound dressing shows great potential as a promising solution for the therapy of chronic wounds and infections.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100300"},"PeriodicalIF":7.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266654252400064X/pdfft?md5=aca2c6568e1d3af723d9eaa731161789&pid=1-s2.0-S266654252400064X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141276137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Marine biomaterials for sustainable bone regeneration 用于可持续骨再生的海洋生物材料

IF 7 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-06-03 DOI: 10.1016/j.giant.2024.100298

Haowei Wang , Xinyu Li , Mingcheng Xuan , Ren Yang , Jianhui Zhang , Jinke Chang

{"title":"Marine biomaterials for sustainable bone regeneration","authors":"Haowei Wang , Xinyu Li , Mingcheng Xuan , Ren Yang , Jianhui Zhang , Jinke Chang","doi":"10.1016/j.giant.2024.100298","DOIUrl":"10.1016/j.giant.2024.100298","url":null,"abstract":"<div><p>The field of bone regeneration has witnessed significant advancements with the exploration and incorporation of marine biomaterials, offering promising avenues for orthopaedic and dental applications. Marine environments are a rich source of biological materials with unique properties conducive to bone healing and regeneration. Repurposing and reusing some waste by-products of marine products for bone regeneration not only contribute to environmental protection but also drives the development of the marine economy, thereby achieving sustainable development. Moreover, the lower production costs associated with the abundant availability and easy processing of marine biomaterials make bone regeneration therapies more accessible to a broader population, enhancing global health equity. By exploring the current research progressions on marine biomaterials and recounting their sources, properties, mechanisms of action, and applications in bone regeneration research, this review provides a comprehensive overview of the potential and challenges of marine biomaterials for future bone healing and regeneration applications.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100298"},"PeriodicalIF":7.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000626/pdfft?md5=a03d96aa25308d97417bfcb70ff6819e&pid=1-s2.0-S2666542524000626-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141277351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistically manipulating the shape of alkyl-chain and asymmetric side groups of non-fullerene acceptors enables organic solar cells to reach 18.5% efficiency 协同操纵非富勒烯受体的烷基链和不对称侧基的形状，使有机太阳能电池的效率达到 18.5%

IF 7 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-05-23 DOI: 10.1016/j.giant.2024.100294

Xinyu Tong , Zhenyu Chen , Jingyu Shi , Jinfeng Ge , Wei Song , Yuanyuan Meng , Ziyi Ge

{"title":"Synergistically manipulating the shape of alkyl-chain and asymmetric side groups of non-fullerene acceptors enables organic solar cells to reach 18.5% efficiency","authors":"Xinyu Tong , Zhenyu Chen , Jingyu Shi , Jinfeng Ge , Wei Song , Yuanyuan Meng , Ziyi Ge","doi":"10.1016/j.giant.2024.100294","DOIUrl":"10.1016/j.giant.2024.100294","url":null,"abstract":"<div><p>Side-chain modification and asymmetric design for non-fullerene acceptors (NFAs) have been proven to be effective methods for harvesting high-performance organic solar cells (OSCs). Combining the two molecular design strategies, we adopted phenyl chain and alkyl chains with different shapes to develop two novel asymmetric NFAs, named BTP-P2EH<img>C11 and BTP-P2EH<img>C2C4. Compared with BTP-P2EH<img>C2C4 attached 2-ethylhexyl side chain, BTP-P2EH<img>C11 with linear alkyl side chain have slightly red-shifted absorption and intensive absorption strength. Moreover, the PM6:BTP-P2EH<img>C11 blend film presents higher and more balanced charge mobilities, reducing charge recombination, tighter intermolecular packing and more favorable fibrous network morphology with appropriate phase separation than PM6:BTP-P2EH<img>C2C4, which lead to significantly enhanced short-circuit current density (<em>J</em><sub>SC</sub>) of PM6:BTP-P2EH<img>C11-based devices. Thus, the OSCs based on PM6:BTP-P2EH<img>C11 achieve a superior power conversion efficiency (PCE) of 18.50% with a good trade-off among open-circuit voltage (<em>V</em><sub>OC</sub>) of 0.876 V, <em>J</em><sub>SC</sub> of 26.85 mA cm<sup>−2</sup> and fill factor (FF) of 78.65%, while PM6:BTP-P2EH<img>C2C4-based device exhibits a lower PCE of 17.49%. Our investigation elucidates that the combination of finely optimizing the shape of alkyl-chain and asymmetric side groups of NFAs could pave a promising avenue toward morphology optimization and performance promotion of OSCs.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100294"},"PeriodicalIF":7.0,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000584/pdfft?md5=fa4baf84a06e851e2e43996b95063119&pid=1-s2.0-S2666542524000584-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141139680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Patterning of 2D second harmonic generation active arrays in ferroelectric nematic fluids 铁电向列流体中二维二次谐波发生有源阵列的图案化

IF 5.4 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-06-27 DOI: 10.1016/j.giant.2024.100315

M. Lovšin , A. Petelin , B. Berteloot , N. Osterman , S. Aya , M. Huang , I. Drevenšek-Olenik , R.J. Mandle , K. Neyts , A. Mertelj , N. Sebastian

{"title":"Patterning of 2D second harmonic generation active arrays in ferroelectric nematic fluids","authors":"M. Lovšin , A. Petelin , B. Berteloot , N. Osterman , S. Aya , M. Huang , I. Drevenšek-Olenik , R.J. Mandle , K. Neyts , A. Mertelj , N. Sebastian","doi":"10.1016/j.giant.2024.100315","DOIUrl":"https://doi.org/10.1016/j.giant.2024.100315","url":null,"abstract":"<div><p>Ferroelectric nematic liquid crystals exhibit unique non-linear optical properties, with the potential to become transformative materials for photonic applications. A promising direction relies on the fabrication of tailored polar orientational patterns via photoalignment, thus shaping the non-linear optical susceptibility through thin slabs of the ferroelectric fluid. Here, we explore the fabrication of 2D periodic SHG active arrays in ferroelectric nematic fluids, for different materials, cell thicknesses and motifs. Based on polarizing optical microscopy observations in combination with optical simulations, second harmonic generation microscopy and interferometry, the 3D structure of the motifs is revealed. Two different 2D periodic patterns are explored, showing that the balance between flexoelectric and electrostatic energy can lead to different domain structures, an effect which is rooted in the difference between the flexoelectric properties of the materials. It is shown that by combining the surface-inscribed alignment with different spontaneous degrees of twist, 2D SHG active arrays can be obtained in the micrometre scale, in which adjacent areas exhibit maximum SHG signals at opposite angles.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100315"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000791/pdfft?md5=7c7b5eab4216cd5c31c62ad93de2a8ff&pid=1-s2.0-S2666542524000791-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141540430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correlating crystallinity and performance in single-component organic solar cells based on double-cable conjugated polymers 基于双缆共轭聚合物的单组分有机太阳能电池的结晶度与性能相关性

IF 5.4 1区化学

GIANT Pub Date : 2024-08-01 Epub Date: 2024-07-08 DOI: 10.1016/j.giant.2024.100322

Zhou Zhang , Qiaomei Chen , Jing Wang , Chengyi Xiao , Zheng Tang , Christopher R. McNeill , Weiwei Li

{"title":"Correlating crystallinity and performance in single-component organic solar cells based on double-cable conjugated polymers","authors":"Zhou Zhang , Qiaomei Chen , Jing Wang , Chengyi Xiao , Zheng Tang , Christopher R. McNeill , Weiwei Li","doi":"10.1016/j.giant.2024.100322","DOIUrl":"10.1016/j.giant.2024.100322","url":null,"abstract":"<div><p>The thin film morphology of double-cable conjugated polymers is critical to the performance of single-component organic solar cells (SCOSCs). Here, we explore the effect of thin film crystallinity on device performance by varying the thermal annealing temperature used during device fabrication. Our investigations reveal that a moderate annealing temperature of 150 °C optimizes the power conversion efficiency in SCOSCs. Although higher annealing temperatures leads to increased crystalline order, a decrease in device performance is observed, attributed to imbalanced carrier transport and increased charge recombination. Additionally, the progressive decrease in the open-circuit voltage of these cells with increasing annealing temperature is linked to augmented non-radiative voltage losses, stemming from the increase in film crystallinity. This study underscores the critical necessity of achieving a delicate optimization of film microstructure in order to maximize the efficiency of SCOSCs, while also delineating prospective avenues for refining the molecular design and processing of double-cable polymers to bolster solar cell performance.</p></div>","PeriodicalId":34151,"journal":{"name":"GIANT","volume":"19 ","pages":"Article 100322"},"PeriodicalIF":5.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666542524000869/pdfft?md5=a30b245aa83b95f4268f136e9f37e2df&pid=1-s2.0-S2666542524000869-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141623746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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