Nanotechnology最新文献

Efficient hot carrier injection in plasmonic semiconductor heterojunction for artificial photosynthesis of ammonia.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-08 DOI: 10.1088/1361-6528/adc740

Keming Wu, Qiang Li, Shuai Yue, Xiaoxia Bai, Xinfeng Liu, Zhenhuan Zhao

{"title":"Efficient hot carrier injection in plasmonic semiconductor heterojunction for artificial photosynthesis of ammonia.","authors":"Keming Wu, Qiang Li, Shuai Yue, Xiaoxia Bai, Xinfeng Liu, Zhenhuan Zhao","doi":"10.1088/1361-6528/adc740","DOIUrl":"10.1088/1361-6528/adc740","url":null,"abstract":"We developed a plasmonic semiconductor p-n junction byin situgrowing p-type Cu3BiS3in n-type Bi2S3nanorods by an ion exchange method. The formation of plasmonic semiconductor heterojunctions was verified through high-resolution transmission electron microscopy, Mott-Schottky tests, x-ray photoelectron spectroscopy-based valence band spectra, and powder x-ray diffraction. Additionally, the rapid transfer of hot carriers between the heterojunctions was investigated using ultrafast transient absorption spectroscopy (TAS). The plasmonic p-n junction shows strong localized surface plasmon resonance (LSPR) absorption in the near-infrared (IR) range and delivers a 61-fold enhancement of the ammonia production rate under full spectrum irradiation in pure water. It can achieve an apparent quantum efficiency of 0.45% at 400 nm and 0.16% at 1000 nm.In situFourier-transform IR reveals that the plasmonic semiconductor heterojunction promotes the nitrogen chemisorption and activation. Based on TAS measurements, we found that LSPR induced hot carriers can be efficiently injected from plasmonic Cu3BiS3to non-plasmonic Bi2S3, with sufficient energy to drive water oxidation reaction. We further confirmed that photothermal effects have negligible contribution to the photocatalytic performance in the water-particle suspension system. The present study shows a potential strategy utilizing plasmonic semiconductors made of earth-abundant elements for green ammonia synthesis.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Insights into phase mixing of quasi-2D and 3D perovskites within a polymer matrix.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-08 DOI: 10.1088/1361-6528/adca3f

Kartiki Chandratre, Pragya Pragya, Bhanu Pratap Dhamaniya, Supravat Karak

{"title":"Insights into phase mixing of quasi-2D and 3D perovskites within a polymer matrix.","authors":"Kartiki Chandratre, Pragya Pragya, Bhanu Pratap Dhamaniya, Supravat Karak","doi":"10.1088/1361-6528/adca3f","DOIUrl":"https://doi.org/10.1088/1361-6528/adca3f","url":null,"abstract":"This study presents a straightforward approach that utilizes ligands and surfactants to engineer the colloidal suspension of perovskite. By integrating the properties of polymers and perovskites with selective additives, we can create novel materials that encompass the desirable attributes of both components. We have developed a novel \"perovskite-in-polymer matrix\" solution designed for one-step coating of colloidal perovskite, allowing for the production of distinct and tailored morphologies. This solvent system features various additives and can serve as a template to achieve similar morphologies, provided the additives contain related functional groups. These inks can be adjusted to produce different surface morphologies governed by the control of colloidal composition and the dynamics of molecular arrangement, which we explore in detail in this manuscript. Additionally, this study aims to investigate the phase segregation observed in quasi-2D-3D perovskite polycrystalline films formed using these template inks. Overall, our work on the 'perovskite-in-polymer matrix' delves into colloidal chemistry, molecular arrangement, film morphology, and the properties of particle structure, size, and shape, as well as their optoelectronic characteristics. We provide a comprehensive analysis of these aspects of the template inks through an extensive range of measurements, including X-ray diffraction (XRD), scanning electron microscopy (SEM), steady-state photoluminescence (SSPL), UV-vis absorbance, confocal laser scanning microscopy (CLSM), and small-angle X-ray scattering (SAXS).","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143811838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Bimetallic nanoparticles: towards selective analysis of phosphorylated compounds by surface-enhanced Raman spectroscopy.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-07 DOI: 10.1088/1361-6528/adc583

Vladimir Jonas, Jiri Volanek, Jan Prikryl, Anna Tycova

{"title":"Bimetallic nanoparticles: towards selective analysis of phosphorylated compounds by surface-enhanced Raman spectroscopy.","authors":"Vladimir Jonas, Jiri Volanek, Jan Prikryl, Anna Tycova","doi":"10.1088/1361-6528/adc583","DOIUrl":"https://doi.org/10.1088/1361-6528/adc583","url":null,"abstract":"The selective detection of phosphorylated molecules is crucial for various biochemical and analytical applications, yet remains challenging due to their weak Raman signals and limited interactions with conventional SERS substrates. This study presents a novel synthesis strategy for bimetallic Ag/FexOynanocomposites with ambition for the improved sensitivity and selectivity of SERS detection for phosphorylated compounds. Our approach successfully integrates alkaline precipitation of iron salts with the reduction of silver cations, overcoming the inherent incompatibility of these processes to produce a stable colloid. The resulting nanocomposites feature an architecture that ensures direct analyte interaction with both components: iron oxides selectively capture phosphorylated molecules, while silver provides plasmonic enhancement of the Raman signal. Our findings highlight the critical role of the silver/iron oxides interface in governing SERS sensitivity. This work represents a significant step toward more effective SERS-based detection strategies, with potential applications in real-time analysis using flow-based systems, such as online monitoring after separation techniques in biochemical and medical fields.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":"36 18","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143795830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Bi₄Ti₃O₁₂nanosheets loaded with Rh as special cocatalysts enhancing visible-light driven water splitting activity of ZnIn₂S₄nanosheets.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-04 DOI: 10.1088/1361-6528/adc4ee

Chen Zhang, Ruipeng Hou, Shufang Chang, Rong Wu, Shunhang Wei

{"title":"Bi4Ti3O12nanosheets loaded with Rh as special cocatalysts enhancing visible-light driven water splitting activity of ZnIn2S4nanosheets.","authors":"Chen Zhang, Ruipeng Hou, Shufang Chang, Rong Wu, Shunhang Wei","doi":"10.1088/1361-6528/adc4ee","DOIUrl":"10.1088/1361-6528/adc4ee","url":null,"abstract":"Cocatalysts generally serve as active sites accelerating carrier separation. However, when the hydrophilicity of photocatalyst itself is poor, the trapped electrons or holes on cocatalysts are difficult to react with reactants quickly. In this work, Bi4Ti3O12nanosheets with excellent hydrophilicity was prepared and then thermally deposited Rh on their surface (Bi4Ti3O12(Rh)), and finally in-suit grew ZnIn2S4on the surface of Bi4Ti3O12(Rh). Based on the results of photocatalytic performance and materials characterization, it was found that the Bi4Ti3O12(Rh) in the photocatalytic system could be considered as a special cocatalyst rather than formed heterojunction with the ZnIn2S4. Under visible-light irradiation, the Rh acted as an electron trapping site to conduct photogenerated electrons trapping from ZnIn2S4to the surface of Bi4Ti3O12. This process not only further accelerated carrier separation, but also facilitated electrons reacting with water due to the excellent hydrophilicity of Bi4Ti3O12(Rh), thereby achieving enhanced photocatalytic H2production performance in the absence of sacrificial agents.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Recent development in friction of supramolecular gel lubricant: from mechanisms to applications. 超分子凝胶润滑剂摩擦的最新发展：从机理到应用。

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-04 DOI: 10.1088/1361-6528/adc39f

Zhang Ruochong, Wang Dongmei, Cheng Xinshao, Wang Minghuan, Hu Xiaodong, Ding Qi, Xu Xuefeng, Cai Meirong, Hu Litian

引用次数: 0

Variability induced by random discrete dopants in source and drain extensions of gate-all-around nanosheet FETs: a quantum transport simulation study.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-04 DOI: 10.1088/1361-6528/adc606

Jaehyun Lee, Tapas Dutta, Vihar P Georgiev, Asen Asenov

{"title":"Variability induced by random discrete dopants in source and drain extensions of gate-all-around nanosheet FETs: a quantum transport simulation study.","authors":"Jaehyun Lee, Tapas Dutta, Vihar P Georgiev, Asen Asenov","doi":"10.1088/1361-6528/adc606","DOIUrl":"10.1088/1361-6528/adc606","url":null,"abstract":"Gate-all-around (GAA) nanosheet field-effect transistors (FETs) have significantly advanced nanoscale device technology by mitigating short-channel effects. These GAA structures are becoming essential in sub-3 nm technology and are evolving into complementary FETs. Despite the reduction in variability achieved by multi-gate structures, random discrete dopants (RDDs) in source and drain (S/D) regions continue to pose challenges. This study addresses the local variability induced by RDDs, particularly in the S/D extensions in GAA nanosheet FETs. Through statistical quantum transport simulations under a ballistic approximation, we investigate parameters such as spacer length, channel width, and channel thickness. The results show that RDDs in the S/D extensions cause not only threshold voltage variation but also increase resistance and reduce ON-state current. GAA nanosheet FETs with a3 nm×10 nmcross-sectional channel and 5 nm spacer length exhibit 10% reduction in ON-state current compared to the ideal device, along with a standard deviation (variability) of 0.35µA. Mitigation of these effects requires the use of thin, wide, and large cross-section nanosheets and short spacer lengths.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Isolation by dialysis and characterization of luminescent oxidized carbon nanoparticles from graphene oxide dispersions: a facile novel route towards a more controlled and homogeneous substrate with a wider applicability^.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-04 DOI: 10.1088/1361-6528/adc608

Francesco Amato, Martina Fazi, Leonardo Giaccari, Sara Colecchia, Giordano Perini, Valentina Palmieri, Massimiliano Papi, Pietro Altimari, Alessandro Motta, Mauro Giustini, Robertino Zanoni, Andrea Giacomo Marrani

{"title":"Isolation by dialysis and characterization of luminescent oxidized carbon nanoparticles from graphene oxide dispersions: a facile novel route towards a more controlled and homogeneous substrate with a wider applicability.","authors":"Francesco Amato, Martina Fazi, Leonardo Giaccari, Sara Colecchia, Giordano Perini, Valentina Palmieri, Massimiliano Papi, Pietro Altimari, Alessandro Motta, Mauro Giustini, Robertino Zanoni, Andrea Giacomo Marrani","doi":"10.1088/1361-6528/adc608","DOIUrl":"10.1088/1361-6528/adc608","url":null,"abstract":"Graphene Oxide (GO) is a two-dimensional (2D) nanomaterial largely exploited in many fields. Its preparation, usually performed from graphite in an oxidant environment, generally affords 2D layers with a broad size distribution, with overoxidation easily occurring. Here, we investigate the formation, along the Hummers synthesis of GO, of carbon nanoparticles (CNPs) isolated from GO and characterized through morphological and spectroscopic techniques. The purification methodology here applied is based on dialysis and results highly advantageous, since it does not involve chemical processes, which may lead to modifications in the composition of GO layers. Using a cross-matched characterization approach among different techniques, such as x-ray photoelectron spectroscopy, cyclic voltammetry and fluorescence spectroscopy, we demonstrate that the isolated CNP are constituted by layers that are highly oxidized at the edges and are stacked due toπ-πinteraction among their aromatic basal planes and H-bonded via their oxidized groups. These results, while representing a step forward in the comprehension of the structure of long-debated carbon debris in GO, strongly point to the introduction of dialysis as an indispensable step toward the preparation of more controlled and homogeneous GO layers and to its use for the valorization of low molecular weight GO species as luminescent CNPs.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Significantly boosted photocatalytic hydrogen evolution by Pd-TiO₂/ZnIn₂S₄nanowires heterojunction under simulated sunlight.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-04 DOI: 10.1088/1361-6528/adc554

Mingming Du, Zheng Fang, Hongyue Liu, Qiyun Li, Anxian Peng, Huimei Chen, Yitong Liu, Jinwen Zhan, Rongjun Yan

{"title":"Significantly boosted photocatalytic hydrogen evolution by Pd-TiO2/ZnIn2S4nanowires heterojunction under simulated sunlight.","authors":"Mingming Du, Zheng Fang, Hongyue Liu, Qiyun Li, Anxian Peng, Huimei Chen, Yitong Liu, Jinwen Zhan, Rongjun Yan","doi":"10.1088/1361-6528/adc554","DOIUrl":"10.1088/1361-6528/adc554","url":null,"abstract":"In this work, Pd-TiO2/ZnIn2S4nanowires (Pd-Ti-Nws/ZIS) heterostructures catalysts were prepared and applied to photocatalytic hydrogen evolution under simulated sunlight. The results revealed that the hydrogen production rate of Pd-Ti-Nws-40/ZIS was as high as 66.7 mmol·g-1·h-1, which was 20.5 and 418 times as much as that of pure ZIS and Pd-Ti-Nws, respectively. After 5 cycles, the hydrogen production of the photocatalyst can still reach about 60 mmol within 120 min. According to the results of photochemistry and x-ray photoelectron spectroscopy, Pd-Ti-Nws/ZIS meets the S-scheme heterojunction system, which is beneficial to inhibit the recombination of photogenerated holes and electrons and increase carrier transport rate through the S-scheme heterojunction. Under light radiation, Pd-Ti-Nws is positively charged due to the accumulation of holes, and ZIS is negatively charged due to the accumulation of electrons with higher reducing power. Moreover, Pd nanoparticles obviously improve the response range and intensity of the catalyst to sunlight. Therefore, the photocatalytic hydrogen production rate obviously increased. This work provides a reasonable method for designing efficient catalysts for photocatalytic hydrogen production.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Fluorescence dynamics of color centers in diamond needles.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-03 DOI: 10.1088/1361-6528/adc4f1

Elena Filonenko, Polina Kuzhir, Sergei Malykhin

引用次数: 0

Electrostatic control of transconductance oscillations in MoS₂/WSe₂heterostructure.

IF 2.9 4区材料科学

Nanotechnology Pub Date : 2025-04-03 DOI: 10.1088/1361-6528/adc4ed

Nhat Anh Nguyen Phan, Inayat Uddin, Hai Yen Le Thi, Nobuyuki Aoki, Hye Jung Kim, Kenji Watanabe, Takashi Taniguchi, Muhammad Atif Khan, Gil-Ho Kim

{"title":"Electrostatic control of transconductance oscillations in MoS2/WSe2heterostructure.","authors":"Nhat Anh Nguyen Phan, Inayat Uddin, Hai Yen Le Thi, Nobuyuki Aoki, Hye Jung Kim, Kenji Watanabe, Takashi Taniguchi, Muhammad Atif Khan, Gil-Ho Kim","doi":"10.1088/1361-6528/adc4ed","DOIUrl":"10.1088/1361-6528/adc4ed","url":null,"abstract":"The progression of quantum phenomena aligns closely with the miniaturization of nano-semiconductor transistors. This necessitates innovative quantum structures beyond traditional transistor types. Investigating electrostatically defined nanoscale devices within two-dimensional (2D) semiconductor heterostructures, particularly van der Waals heterostructures offers advantages like large-scale uniformity and flexibility. Here, we focus on the charge transport of a MoS2/WSe2encapsulated heterostructure controlled by a split-gate configuration, revealing a distinctive step-like current profile at a low temperature of 77 K. The observed distinguishable regimes in the current highlight the impact of quantum confinement induced by reduced lateral dimensions coupled with precise electrostatic confinement controlled by gate voltages. The temperature dependence of the device is also investigated to understand the role of thermal effects on the observed electrostatic-controlled transconductance oscillations phenomenon. This study contributes to a deeper understanding of electrostatic effects in 2D transition metal dichalcogenide heterostructures in narrow regimes. It holds promise for developing future integrated electronic devices based on 2D semiconducting nanomaterials with tailored confinement and enhanced functionalities.","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143710448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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