{"title":"Soft Electromagnetic Actuator and Oscillator","authors":"Noah D. Kohls, Yi Chen Mazumdar","doi":"10.1002/admt.202400982","DOIUrl":"https://doi.org/10.1002/admt.202400982","url":null,"abstract":"<p>Soft actuators are critical for enabling soft robots, medical devices, and haptic systems. Many soft actuators, however, require power to hold a configuration and rely on hard circuitry for control, limiting their potential applications. In this work, the first soft electromagnetic system is demonstrated for externally-controlled bistable actuation or self-regulated astable oscillation. This novel bellows-shaped actuator uses liquid metal encased in silicone as a compliant conductor that is capable of force generation, integrated sensing, and self-reconnecting. In the bistable configuration, the actuator can hold positions with no power. By utilizing a unique soft kinking mechanism, the actuator can generate feedback for self-regulated oscillation. The construction, sensing, and feedback mechanisms for this actuator are first discussed. Then, the force output, thermal performance, and dynamics are characterized. The bistable version has a stroke of 6 mm and can compress/expand with only 15 W of power for 30 ms. The astable version has a stroke of 3 mm and can oscillate at 27 Hz with 18 W of power. Several applications are demonstrated including bistable crawling, hopping, pulsing, and swimming. By adding a 20 V battery, self-regulated astable vibrational locomotion is also demonstrated. Overall, this work shows how these actuators and oscillators can bridge the gap between conventional and soft robots.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 6","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admt.202400982","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143639271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kiyn Chin, Michael Vinciguerra, Dinesh K. Patel, Peter Roberts Olcay, Eldy S. Lazaro Vasquez, Carmel Majidi
{"title":"Accessible Soft Electronics with Silver-Gelatin Conductive Hydrogel Composite","authors":"Kiyn Chin, Michael Vinciguerra, Dinesh K. Patel, Peter Roberts Olcay, Eldy S. Lazaro Vasquez, Carmel Majidi","doi":"10.1002/admt.202401193","DOIUrl":"https://doi.org/10.1002/admt.202401193","url":null,"abstract":"<p>Electrically conductive hydrogels are a promising class of materials for soft electronics and robotics that mimic the mechanics of natural biological tissue. However, these materials are typically derived from petrochemical sources and their production typically involves hazardous solvents and monomers that limit accessibility and environmental compatibility. This study introduces a biomaterial hydrogel composite in which a percolating network of silver microflakes is suspended in a natural, gelatin-based matrix. The composite is primarily composed of inexpensive, food-safe ingredients and fabrication is achieved using accessible consumer-grade equipment. The resulting material system is mechanically soft, stretchable up to 470% strain, and highly conductive up to 3.1 × 10<sup>3</sup> S cm<sup>−1</sup>, with properties that can be tailored based on material composition and processing conditions. In addition to experimental characterization of its material properties, this conductive gelatin composite is shown to be applicable for a variety of uses cases in soft matter circuitry and bioelectronics.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 8","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admt.202401193","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jianglong Chang, Sai Xu, Yuefeng Gao, You Li, Yichao Wang, Hongquan Yu, Yongze Cao, Xizhen Zhang, Baojiu Chen
{"title":"Excitation Wavelength Regulated Dynamic Luminescence in Bi/Sb co-Doped Tin Halide for Encrypted Information Transmission and High-Sensitivity Wavelength Sensor","authors":"Jianglong Chang, Sai Xu, Yuefeng Gao, You Li, Yichao Wang, Hongquan Yu, Yongze Cao, Xizhen Zhang, Baojiu Chen","doi":"10.1002/admt.202401672","DOIUrl":"https://doi.org/10.1002/admt.202401672","url":null,"abstract":"<p>The coordination structure of Sb<sup>3+</sup> within the host lattice critically influences its photophysical properties, sparking interest in luminescent metal halides with multiexciton emissions. Furthermore, the multi-coordination lattice structure of Sb<sup>3+</sup> dynamically emits light with excitation wavelength, highlighting the potential of Sb<sup>3+</sup> ions in tuning luminescence and developing advanced optoelectronic materials. Herein, Sb<sup>3+</sup> ions are successfully doped into Cs<sub>2</sub>SnCl<sub>6</sub>, and the obvious excitation wavelength-dependent emission of Cs<sub>2</sub>SnCl<sub>6</sub>: Sb at room temperature is observed. To explain this phenomenon, density functional theory (DFT) calculations and time-resolved spectra are conducted to confirm that the emission originated from two luminescence centers associated with the [SbCl<sub>6</sub>]<sup>3−</sup> and [SbCl<sub>5</sub>]<sup>2−</sup> coordination. Based on the tunable emission of Cs<sub>2</sub>SnCl<sub>6</sub>: Sb and the effective electron transfer between two triplet self-trapped exciton states induced by Bi<sup>3+</sup> and Sb<sup>3+</sup>, a pixelated code for information encryption is designed. The encoded patterns exhibit color changes under different UV wavelengths, enabling secure and straightforward information encryption. Furthermore, a sensitive UV wavelength sensor is prepared based on Cs<sub>2</sub>SnCl<sub>6</sub>: Bi/Sb, exploiting the monotonic relationship between chromaticity coordinates and wavelength, achieving a resolution superior to previously reported wavelength sensors. This study marks a substantial step toward advancing the multifunctional application of lead-free metal halides.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 8","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Machine Learning-Assisted Hybrid Package of White Light-Emitting Diodes Employing Quantum Dots and Phosphor","authors":"Fengyun Gao, Hao Yang, Changdong Tong, Yijun Lu, Zhong Chen, Weijie Guo","doi":"10.1002/admt.202401555","DOIUrl":"https://doi.org/10.1002/admt.202401555","url":null,"abstract":"<p>White light-emitting diodes (WLEDs), known for their high brightness, high efficiency, and long lifetime, are widely utilized in the backlight of liquid crystal displays. However, it is still difficult to improve the color gamut of WLEDs while maintaining the L<sub>50</sub> lifetime. The luminous characteristics of WLEDs employing different combinations of quantum dots and phosphor are investigated in this work. Additionally, investigations on the L<sub>50</sub> lifetime for WLEDs are carried out by employing a two-step accelerated stress method. Finally, an ensemble machine learning model is proposed to predict the L<sub>50</sub> lifetime of WLEDs, achieving high predictive accuracy with <i>R</i><sup>2</sup> of 0.986.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 8","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jing Yan, Xue Zhang, Peng Xu, Junping Zhang, Xuezhuang Li, Fenglin Zhong, Yunxin Xu, Qiuyu Zhang, Youliang Zhu, Yi Yan
{"title":"Cobaltocenium-Based Metallosurfactants with Unconventional Acid-Resistant Corrosion Protection Behavior","authors":"Jing Yan, Xue Zhang, Peng Xu, Junping Zhang, Xuezhuang Li, Fenglin Zhong, Yunxin Xu, Qiuyu Zhang, Youliang Zhu, Yi Yan","doi":"10.1002/admt.202401559","DOIUrl":"https://doi.org/10.1002/admt.202401559","url":null,"abstract":"<p>Developing highly efficient surfactant-based corrosion inhibitor with multiple interaction sites toward metal surface is crucial for both industry and academy, which can advance the understanding of the anti-corrosion mechanism and the structure-activity relationship of inhibitor. However, achieving this goal remains a challenge because of the limited variety of ionic group and the structure of surfactant. Herein, a series of cobaltocenium-based metallosurfactants is developed through click chemistry, where the cationic cobaltocenium is an ionic group and triazole is a potential coordination site with a metal surface. These metallosurfactants exhibit lower critic micelle concentration than corresponding quaternized ammonium with the same alkyl chains. Owing to the synergetic effect from coordination between triazole and metal surface as well as potential electrostatic interactions between cobaltocenium/protonated triazole with metal surface, these metallosurfactants exhibit highly efficient anti-corrosion performance to mild steel with inhibitive efficiency as high as 95%. Moreover, such a synergetic effect enforces the hydrophilic group anchored to the metal surface and the tilted angle of the hydrophobic chain increases by increasing the chain length, which results unconventional acid-resistant corrosion protection behavior.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 8","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tao Du, Yujiao Zhao, Tao Cui, Yunpeng Qi, Patiman Abudu, Jianbing Song, Bate Nasen
{"title":"Tough and Fast-Responding Fe3+-Coordinated Poly (Acrylic Acid -N-Isopropyl Acrylamide) Shape Memory Hydrogels","authors":"Tao Du, Yujiao Zhao, Tao Cui, Yunpeng Qi, Patiman Abudu, Jianbing Song, Bate Nasen","doi":"10.1002/admt.202401727","DOIUrl":"https://doi.org/10.1002/admt.202401727","url":null,"abstract":"<p>Hydrogels with programmable shape memory hold great promise for applications in soft robots, smart medical devices, etc., but the preparation of tough and fast-responding shape memory hydrogels remains challenging. In this work, Poly (acrylic acid -N-isopropyl acrylamide) (3:1)-Fe<sup>3+</sup> (P(AA-NIPAM)(3:1)-Fe<sup>3+</sup>) hydrogels are obtained by monomer copolymerization and ionic coordination, which exhibited tough mechanical properties with a maximum tensile strength of 2.48 ± 0.08 MPa and a maximum elongation of 338.5 ± 19.6%. The hydrogel also demonstrated a good shape memory effect, with the hydrogel curled into a spiral shape recovering to 71.1% ± 5.9% in 30 s under the swelling effect of water, and the convoluted structure recovering to 95% in 4 s. The shape memory hydrogels prepared based on this method will provide an important reference value for the development of higher performance shape memory hydrogels.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 8","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stephan Oberhans, Wolfgang Heiss, Georg J. Pietsch
{"title":"Crystal Damage and Surface Morphology in Industrial Diamond Wire Slicing of 300 mm Monocrystalline Silicon Wafers for Microelectronic Devices","authors":"Stephan Oberhans, Wolfgang Heiss, Georg J. Pietsch","doi":"10.1002/admt.202401432","DOIUrl":"https://doi.org/10.1002/admt.202401432","url":null,"abstract":"<p>In the semiconductor industry, thin wafers are cut from a monocrystalline silicon. The most important process step is cutting the monocrystal into a multitude of thin substrate slices, which determines the properties of the resulting wafers. Some time ago, the transition from traditional slurry-wire-slicing (S-MWS) to diamond-wire-slicing (D-MWS), which is more cost-effective and resource-efficient, took place. Unlike in the photovoltaic industry and also in the production of smaller wafer diameters of up to 200 mm, it is not possible to create a seamless transition with today's standard wafer diameters of 300 mm due to the waviness that occurs on the wafer surface immediately after the cutting process. This situation considerably limits the achievable component generation (design rule), as the strict requirements of the chip manufacturers cannot be fulfilled. Therefore, a comprehensive understanding of the process is required. A detailed comparison of the surface structure, surface topography, and fracture strength is carried out based on the three relevant crystal orientations Silicon(100), Silicon(110), and Silicon(111). In addition, some wire segments are examined. All microscopic examinations carry out on both the primary and secondary chipping faces do not provide any correlation between the microscopic surface condition and the macroscopic waviness.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 8","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Smart Slippery Surface with Reversible Dynamic Temperature Responsiveness for Long-Term Controllable Anti-Icing","authors":"Jiru Huai, Jiaxuan Zhang, Peng Wang, Wenjie An, Xiang Zhao, Zhen Zhang, Wenliang Wang, Wei Duan, Ying Yue","doi":"10.1002/admt.202401705","DOIUrl":"https://doi.org/10.1002/admt.202401705","url":null,"abstract":"<p>Recently, slippery liquid-infused porous surface (SLIPS) is widely utilized for anti-icing. Nevertheless, a major challenge hindering the practical applications of SLIPS is the depletion of lubricating oil, significantly deteriorating its deicing performance. Given that super-slippery effects are not required during most non-icing periods, this research introduces a novel dynamic wettability-adjustable SLIPS anti-icing coating inspired by the nepenthes. This coating-comprising modified diatomaceous earth and soft silicone rubber-releases lubricating oil only when temperatures fall below −2 °C, thus exhibiting super-slippery characteristics and effectively preventing icing. The porous modified diatomaceous earth retains lubricating oil for prolonged periods and facilitates its controlled release under external forces. The high elasticity and strength of the soft silicone rubber endow the coating with thermal expansion and contraction capabilities, enabling the active absorption and release of lubricating fluid in response to temperature variations. This coating, prepared using a straightforward strategy, demonstrates an ice adhesion strength and an oil loss rate of less than 23 kPa and 13%, respectively, after 50 icing/de-icing cycles. These findings highlight the remarkable performance of the coating, providing valuable insights for achieving long-term anti-icing on the external surfaces of equipment in extreme working conditions.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 8","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kiyoung Kim, Steven Edwards, Kyle Fuxa, Honglu Lin, Shreya Shrestha, Hanwen Fan, Nick Diaz, Joel Berinstein, Rishi Naik, Yuxiao Zhou, Xiaoguang Dong
{"title":"Mucosa-Interfacing Capsule for In Situ Sensing the Elasticity of Biological Tissues","authors":"Kiyoung Kim, Steven Edwards, Kyle Fuxa, Honglu Lin, Shreya Shrestha, Hanwen Fan, Nick Diaz, Joel Berinstein, Rishi Naik, Yuxiao Zhou, Xiaoguang Dong","doi":"10.1002/admt.202401487","DOIUrl":"https://doi.org/10.1002/admt.202401487","url":null,"abstract":"<p>Monitoring the elasticity of soft biological tissues in the gastrointestinal (GI) tract with minimal invasion holds promise for early diagnosis of intestinal fibrosis, colorectal cancer, and other diseases featuring abnormal elasticity. However, existing methods of sensing tissue elasticity have drawbacks such as insufficient resolution for elastography, and discomfort or the requirement of risky anesthesia for flexible endoscopes or implantable devices. Here a wirelessly actuated palpation mechanism is presented, integrated into a swallowable capsule device, offering in situ tissue elasticity measurement with minimal invasiveness. The approach employs a magnetic soft cantilever beam actuated by external magnetic fields to gently press against soft tissues. Mechanical stress and strain are monitored by an onboard magnetic sensor and a strain gauge, allowing for an accurate assessment of tissue elasticity. Additionally, wireless modules utilizing Bluetooth Low Energy (LE) and powered by a battery facilitate real-time communication. The device operates under external magnetic field control, which can move freely over soft tissues during examinations and palpate suspicious areas. The elasticity sensing mechanism is validated and assessed on both phantom structures and <i>ex vivo</i> porcine colon tissues. The capsule device holds significant promise for assessing tissue physiological conditions and facilitating early disease diagnosis in hard-to-reach areas of the body.</p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"10 6","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admt.202401487","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143639093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mattia Utzeri, Marco Sasso, Vikram S. Deshpande, Shanmugam Kumar
{"title":"Multiscale Experiments and Predictive Modeling for Failure Mitigation in Additive Manufacturing of Lattices (Adv. Mater. Technol. 24/2024)","authors":"Mattia Utzeri, Marco Sasso, Vikram S. Deshpande, Shanmugam Kumar","doi":"10.1002/admt.202470111","DOIUrl":"https://doi.org/10.1002/admt.202470111","url":null,"abstract":"<p><b>Additive Manufacturing</b></p><p>The cover image illustrates how cell wall thickness affects the failure mechanisms of fused filament fabrication (FFF)-printed lattices due to process-induced defects. In article number 2400457, Shanmugam Kumar and co-workers provide novel insights into the crushing behaviors of FFF-printed lattices by combining multiscale experiments and predictive modelling.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7292,"journal":{"name":"Advanced Materials Technologies","volume":"9 24","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/admt.202470111","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}