IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202406695

Tao Chen, Shujing Li, Ziyuan Wang, Zhenhua Ge, Yongsheng Zhang, Hongxing Xin, Di Li, Jian Zhang, Xiaoying Qin

{"title":"Achieving Ultralow Lattice Thermal Conductivity and High Thermoelectric Performance in Bi2Te2.7Se0.3 Alloys via Introducing Organic & Inorganic Nanoparticles","authors":"Tao Chen, Shujing Li, Ziyuan Wang, Zhenhua Ge, Yongsheng Zhang, Hongxing Xin, Di Li, Jian Zhang, Xiaoying Qin","doi":"10.1002/smll.202406695","DOIUrl":"https://doi.org/10.1002/smll.202406695","url":null,"abstract":"N-type Bi2Te2.7Se0.3(BTS) is a state-of-the-art thermoelectric material owing to its excellent thermoelectric properties near room temperatures for commercial applications. However, its performance is restricted by its comparatively low figure of merit ZT. Here, it is shown that a 14% increase in power factor (PF) (at 300 K) can be reached through incorporation of inorganic GaAs nanoparticles due to enhanced thermopower originating from the energy-dependent carrier scattering. Besides, further incorporation of organic nanophase PEDOT: PSS can reduce its lattice thermal conductivity by 59% due to the strong scattering of middle- and low-frequency phonons. As a result, a peak ZT value of ZTmax ≈ 1.31 (at 373 K) and an average ZTave ≈ 1.10 (300–473 K) are achieved for the BTS/(0.4 wt.% GaAs + 0.5 wt.% PEDOT: PSS) sample. The present work demonstrates that incorporation of organic–inorganic nanophase is an effective way to improve the performance of BTS.","PeriodicalId":228,"journal":{"name":"Small","volume":"11 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143027143","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

Dissecting Key Factors Influencing Electrochemical Conversion of Carbon Solutions over Nickel Single Atoms

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202410719

Lan-Hui Feng, Ningru Wang, Ye-Bin Zou, Yanwei Li, Xin-Ming Hu

{"title":"Dissecting Key Factors Influencing Electrochemical Conversion of Carbon Solutions over Nickel Single Atoms","authors":"Lan-Hui Feng, Ningru Wang, Ye-Bin Zou, Yanwei Li, Xin-Ming Hu","doi":"10.1002/smll.202410719","DOIUrl":"https://doi.org/10.1002/smll.202410719","url":null,"abstract":"The direct electrochemical conversion of bicarbonate solutions (i.e., captured CO2) has emerged as a sustainable approach for integrating CO2 capture and utilization compared to the traditional independent and sequential route. However, the process of bicarbonate conversion is poorly understood, impeding the development of this new technology. Here, the study explores the critical factors influencing bicarbonate solution conversion over Ni single-atom catalysts, including catalyst structure, carbon source, electrolysis temperature, and electrolyzer type. The catalyst with better exposure of Ni sites and smaller charge transfer resistance exhibits higher activity for the conversion of both gaseous CO2 and bicarbonate solutions. In situ Raman spectroscopy and DFT calculations reveal that bicarbonate conversion follows a two-step pathway, that is, bicarbonate dissociation to generate CO2 followed by CO2 reduction to form CO over Ni sites. Increasing the electrolysis temperature promotes the dissociation of HCO3− and boosts the CO production. More interestingly, switching the Ar/CO2 atmosphere affects the efficiency of CO production in H-cell but has no influence in membrane electrode assembly cell. Such a phenomenon is attributed to different CO2 sources. This work sheds light on the electrochemical conversion of various carbon solutions and establishes the connection between the conversion of gaseous CO2 and captured CO2.","PeriodicalId":228,"journal":{"name":"Small","volume":"12 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026460","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

Neuron Modulation by Synergetic Management of Redox Status and Oxidative Stress

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202408494

Xianping Liu, Xingwu Jiang, Zonghao Liu, Feixiang Chen, Jian Chen, Xu Chu, Wenbo Bu, Yanyan Liu

{"title":"Neuron Modulation by Synergetic Management of Redox Status and Oxidative Stress","authors":"Xianping Liu, Xingwu Jiang, Zonghao Liu, Feixiang Chen, Jian Chen, Xu Chu, Wenbo Bu, Yanyan Liu","doi":"10.1002/smll.202408494","DOIUrl":"https://doi.org/10.1002/smll.202408494","url":null,"abstract":"The transient receptor potential (TRP) channel is a key sensor for diverse cellular stimuli, regulating the excitability of primary nociceptive neurons. Sensitization of the TRP channel can heighten pain sensitivity to innocuous or mildly noxious stimuli. Here, reversible modulation of TRP channels is achieved by controlling both the light-induced photoelectrochemical reaction to induce neuronal depolarization, and antioxidants for neuronal protection. It is based on a hybrid nanosystem, CZPN, created by coating CeO2 nanocrystals with the metalloporphyrin ZnTPyP. Light irradiation triggers an electrochemical response, with efficient electron injection from ZnTPyP to CeO2, converting Ce4+ into Ce3+ as antioxidants. Meanwhile, the charge migrates from surrounding O2 molecules to the hole-injected ZnTPyP*, giving rise to reactive oxygen species (ROS). This change in the redox environment sensitizes TRP channels, eliciting action potentials in primary rat neurons, and is partially blocked by pretreatment with capsazepine. The resulting CeO2-x, with a high Ce3+/Ce4+ ratio, can scavenge excessive ROS to prevent oxidative damage. The light-induced pain behaviors in mice pre-injected with CZPN are further confirmed. This work suggests a safe, effective, and universal approach to photoelectrochemical processes for modulation and research of the peripheral nervous system.","PeriodicalId":228,"journal":{"name":"Small","volume":"57 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026461","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

Interface Engineering and Modulation of Nickel Oxide for High Air-Stable p-Type Crystalline Silicon Solar Cells

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202411818

Le Li, Jiahui Xu, Jilei Wang, Shaojuan Bao

引用次数: 0

A Versatile Dual‐Responsive Shape‐Memory Gripper via Additive Manufacturing Toward High‐Performance Cross‐Scale Objects Maneuvering

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202411029

Sizhu Wu, Jinpeng Fang, Xueli Gao, Ruixiang Liu, Feng Pei, Chuanzong Li, Chao Chen

{"title":"A Versatile Dual‐Responsive Shape‐Memory Gripper via Additive Manufacturing Toward High‐Performance Cross‐Scale Objects Maneuvering","authors":"Sizhu Wu, Jinpeng Fang, Xueli Gao, Ruixiang Liu, Feng Pei, Chuanzong Li, Chao Chen","doi":"10.1002/smll.202411029","DOIUrl":"https://doi.org/10.1002/smll.202411029","url":null,"abstract":"Smart grippers serving as soft robotics have garnered extensive attentions owing to their great potentials in medical, biomedical, and industrial fields. Though a diversity of grippers that account for manipulating the small objects (e.g., tiny micrometer‐scale droplets) or the big ones (e.g., centimeter‐scale screw) has been proposed, however, cross‐scale maneuvering of these two species leveraging an all‐in‐one intelligent gripper is still challenging. Here, a magnet/light dual‐responsive shape‐memory gripper (DR‐SMG) is reported, based on the hybrid of Fe‐nanoparticles and shape‐memory polymers. Thanks to its photothermal effect, the closed‐state DR‐SMG switches to the open state under the synergetic cooperation of near‐infrared‐ray (NIR) and a circinate magnetic field, referring to the temporary state. On the other hand, once the NIR is loaded, the temporary opened DR‐SMG would reconfigure to its permanent closed state owing to shape‐memory effect. Leveraging this principle, DR‐SMG can grasp and release diverse cross‐scale objects ranging from micrometers to centimeters including metals, glass balls, polymers, and small liquids. Significantly, this versatile DR‐SMG is capable of spatially delivering multifunctional chemical droplets and conductive liquid metals, thereby enabling lab‐on‐chip and electrical switch applications. This work provides new insights into intelligent grippers and further advances the field of soft robotics.","PeriodicalId":228,"journal":{"name":"Small","volume":"12 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026578","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

Regulating Charge Distribution in Porphyrin‐Based Polymer for Achieving Photocatalytic CO2 Conversion to CH4 or C2H6

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202409575

Guo‐Wei Guan, Su‐Tao Zheng, Li‐Ping Zhang, Si‐Chao Liu, Yi‐Tao Li, Yu Jiang, Shuang Ni, Jia Fu, Pei‐Gao Duan, Qingyuan Yang, Qing‐Yuan Yang

{"title":"Regulating Charge Distribution in Porphyrin‐Based Polymer for Achieving Photocatalytic CO2 Conversion to CH4 or C2H6","authors":"Guo‐Wei Guan, Su‐Tao Zheng, Li‐Ping Zhang, Si‐Chao Liu, Yi‐Tao Li, Yu Jiang, Shuang Ni, Jia Fu, Pei‐Gao Duan, Qingyuan Yang, Qing‐Yuan Yang","doi":"10.1002/smll.202409575","DOIUrl":"https://doi.org/10.1002/smll.202409575","url":null,"abstract":"The photocatalytic conversion of CO2 into products such as CH4 and C2H6 poses a significant challenge due to the lengthy reaction steps and the high energy barrier involved. In this study, both benzothiadiazole (BTD) and hydroxyl groups (‐OH) are introduced into cobalt‐based polymerized porphyrinic network (PPN) through a C‐C coupling reaction. This modification of orbital energy levels that strengthens the ability of gain electrons and facilitates the charge transfer in PPN. Hydroxyl group largely enhances the ability for light response, while thiadiazole unit tunes the molecular orbital to proper energy level. By this way, BTD‐DBP‐PPN(Co) achieves the capability for CO2 conversion to CH4 and C2H6 under the irradiation of light. Co active site is introduced to reduce the energy barrier and facilitate the charge transfer. The reaction pathway for C2H6 production has been studied for further mechanism explanation. Overall, a series of cobalt‐based porphyrin centers with a donor–acceptor (D‐A) structure are designed and synthesized to enhance CO2 reduction performance and achieve the formation of C2 products under 300‐W Xe lamp irradiation.","PeriodicalId":228,"journal":{"name":"Small","volume":"109 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026907","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

Internal Nanocavity Regulation of Embedded Rare Earth Up‐Conversion Nanoparticles for H2O2 Production Operable at Up to 780 nm

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202406513

Ben Chong, Honghui Ou, Baorong Xu, Yu Jin, Song Kou, He Li, Guidong Yang

{"title":"Internal Nanocavity Regulation of Embedded Rare Earth Up‐Conversion Nanoparticles for H2O2 Production Operable at Up to 780 nm","authors":"Ben Chong, Honghui Ou, Baorong Xu, Yu Jin, Song Kou, He Li, Guidong Yang","doi":"10.1002/smll.202406513","DOIUrl":"https://doi.org/10.1002/smll.202406513","url":null,"abstract":"Semiconductor photocatalysts embedded with rare earth upconversion nanoparticles (REUPs) are a promising strategy to improve their photoresponse range, but their photocatalytic performance within the near‐infrared (NIR) region is far from satisfactory. Here, a method is reported to improve the photocatalytic activity by adjusting the nanocavity of upconversion nanoparticles inside a semiconductor. Two types of CdS embedded with NaYF4:Yb,Er photocatalysts with core‐shell structure (no cavity) (NYE/CdS) and yolk‐shell structure (empty cavity) (NYE@CdS) are synthesized by different methods. Experimental and theoretical analysis indicates that the yolk‐shell structure NYE@CdS can enhance the local fluorescence‐induced electric field within the hollow cavity, and realize more effective energy transfer from REUPs to CdS. Notably, the H2O2 production performance of NYE@CdS reaches 0.33 mmol g−1 h−1 under NIR light irradiation (λ > 780 nm), exceeding most of the reported photocatalysts. This research will provide new ideas for the design of high‐efficiency photocatalysts for H2O2 production.","PeriodicalId":228,"journal":{"name":"Small","volume":"206 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026573","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

Modulating Electronic Density of Single-Atom Ni Center by Heteroatoms for Efficient CO2 Electroreduction

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202411249

Yang Chen, Xiaoli Pan, Lin Li, Meixin Chen, Hongchen Cao, Yang Zhao, Xiaodong Wang, Jian Lin

{"title":"Modulating Electronic Density of Single-Atom Ni Center by Heteroatoms for Efficient CO2 Electroreduction","authors":"Yang Chen, Xiaoli Pan, Lin Li, Meixin Chen, Hongchen Cao, Yang Zhao, Xiaodong Wang, Jian Lin","doi":"10.1002/smll.202411249","DOIUrl":"https://doi.org/10.1002/smll.202411249","url":null,"abstract":"Single-atom catalysts (SACs) with unique geometric and electronic configurations have triggered great interest in many important reactions. However, controllably modulating the electronic structure of metal centers to enhance catalytic performance remains a challenge. Here, the electronic structure of Ni centers over Ni1-NC SACs by introducing electron-rich phosphorus or electron-deficient boron for electrochemical CO2 reduction (CO2RR) is systematically tailored. It is found that the Ni1-PNC with Ni1-N3P site exhibits superior performance with a current density of 14.6 mA cm−2 and a Faradaic efficiency of 90.6% at −0.8 V versus RHE for CO production, far exceeding Ni1-NC and Ni1-BNC SACs. Detailed characterizations and theoretical calculations reveal a linear relationship between the valence state of Ni species and the CO2RR performance. The incorporation of P species facilitates the electronic localization around the Ni1 center, significantly promoting the adsorption of CO2 and the formation of key *COOH intermediate to enhance CO2RR. This work provides a feasible approach to quantitatively manipulate the electronic structure of single-atom metal sites and to rationally design highly efficient catalysts for boosted performance.","PeriodicalId":228,"journal":{"name":"Small","volume":"112 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026467","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

Semiconducting Overoxidized Polypyrrole Nano-Particles for Photocatalytic Water Splitting

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202407364

Xiaojiao Yuan, Girlie Eunice Lopez, Viet-Dung Duong, Samy Remita, Diana Dragoe, Dris Ihiawakrim, Ovidiu Ersen, Yannick Dappe, Winfried Leibl, Hynd Remita, Ally Aukauloo

{"title":"Semiconducting Overoxidized Polypyrrole Nano-Particles for Photocatalytic Water Splitting","authors":"Xiaojiao Yuan, Girlie Eunice Lopez, Viet-Dung Duong, Samy Remita, Diana Dragoe, Dris Ihiawakrim, Ovidiu Ersen, Yannick Dappe, Winfried Leibl, Hynd Remita, Ally Aukauloo","doi":"10.1002/smll.202407364","DOIUrl":"https://doi.org/10.1002/smll.202407364","url":null,"abstract":"Capturing sunlight to fuel the water splitting reaction (WSR) into O2 and H2 is the leitmotif of the research around artificial photosynthesis. Organic semiconductors have now joined the quorum of materials currently dominated by inorganic oxides, where for both families of compounds the bandgaps and energies can be adjusted synthetically to perform the Water Splitting Reaction. However, elaborated and tedious synthetic pathways are necessary to optimize the photophysical properties of organic semiconductors. This study reports here, that when pyrrole dissolved distilled water is exposed to high energy radiation, this leads to the formation of nanostructured spherical polypyrrole (Nano-PPy) particles that are characterized as overoxidized polypyrrole. Electrochemical studies and Tauc's plot highlight the production of a semiconducting material with a bandgap of ≈1.8 eV with the conduction band at ≈−0.5 V and a valence band at ≈+1.3 V vs NHE. When suspended in water and under irradiation at wavelengths higher than 420 nm, Nano-PPy materials lead to O2 evolution, while electrons and protons can be recovered in the form of reduced quinone. Interestingly, upon intermittent visible irradiation and dark phases, a consumption of the evolved O2 from oxidation of water is observed. This concomitant O2 reduction is found to produce H2O2.","PeriodicalId":228,"journal":{"name":"Small","volume":"74 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026468","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

Enhancing Diabetic Oral Wound Healing with miR‐132 Delivered Through Tetrahedral DNA Nanostructures

IF 13.3 2区材料科学

Small Pub Date : 2025-01-24 DOI: 10.1002/smll.202411353

Qiangqiang Zhou, Mengqi Zhou, Guofeng Yang, Xin Sui, Changyi Li, Huaxing Xu, Yuehua Liu, Xiaoling Wei

{"title":"Enhancing Diabetic Oral Wound Healing with miR‐132 Delivered Through Tetrahedral DNA Nanostructures","authors":"Qiangqiang Zhou, Mengqi Zhou, Guofeng Yang, Xin Sui, Changyi Li, Huaxing Xu, Yuehua Liu, Xiaoling Wei","doi":"10.1002/smll.202411353","DOIUrl":"https://doi.org/10.1002/smll.202411353","url":null,"abstract":"Oral mucosal injuries are commonly caused by factors such as trauma, infection, or inflammation, especially in diabetic patients where healing is difficult and significantly affects quality of life. In this study, a nanocarrier system based on DNA tetrahedrons (TDN) is developed, which serve as ideal vectors due to their excellent intracellular uptake and drug delivery capabilities. By efficiently delivering miR132 into cells, the proliferation and migration of human oral mucosal fibroblasts (HOMFs) and human umbilical vein endothelial cells (HUVECs) are regulated, along with the modulation of inflammation and antioxidant processes. In the oral wound model of diabetic rats, the miR@TDN system effectively and stably delivers miR132 to the injured mucosa. By regulating the inflammatory response, promoting blood vessel regeneration, and enhancing antioxidant defense mechanisms, significant improvement in cellular repair function and acceleration of the wound healing process are observed. These findings provide a new strategy and experimental basis for the clinical treatment of oral mucosal injuries.","PeriodicalId":228,"journal":{"name":"Small","volume":"9 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026574","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

Small最新文献