International Journal of Analytical Chemistry
·
2017
·
IF 0.901
Xue Shouqing,Liu Xiaohui
The self-assembled monolayer (SAM) was prepared using octadecyl trichlorosilane (OTS) in distilled solution on the copper surface. The effect of inhibitor concentration on the rate of inhibition efficiency and corrosion rate in corrosion medium on copper by using polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM) was studied. The results showed that OTS SAMs exhibit the better corrosion resistance; the corrosion potential of copper OTS SAMs protection increased by about 1.02 V, while the corrosion current density decreased to 0.59 A/cm2. The corrosion rate is minimized and flattened and can reach 9.2% while the inhibition efficiency reached 95.4%, when the corrosion inhibitor has concentration of 40 ppm.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
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DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Haiyang Zhang,Yan Yang,Jianming Zhao,Hanjun Yang,Ying Lu,Yihuan Xie,Shuo Yao,Zhaoyang Chu,Changjian Huang,Zengqi Huang,Mingbin Zhou,Qixin Wan,Qi Li,Tianxiang Zhao,Qianying Lin,Xia Yang,Rui Guo,Zhihua Xiong,Xiaotian Hu
Self-assembled monolayers (SAMs) serve as the hole-transporting layer (HTL) in perovskite solar cells, yet their instability on indium tin oxide (ITO) substrates poses a challenge in practical. The typical SAMs are susceptible to solvents during the perovskite layer deposition process which can result in being washed or dislodged, thereby impeding the formation of a dense SAM. Here, a novel guanidine-modified polyurethane siloxane elastomers is synthesized to enhance the anchoring capability of SAMs on ITO, which exhibits strong interactions with [2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl] phosphonic acid (MeO-2PACz) SAMs, to co-construct a self-assembled composite structure (SACS). By utilizing this anchor strategy, the weakly bonded MeO-2PACz adhering to ITO can be converted into a strongly bonded form, thereby curtailing the migration of MeO-2PACz on the ITO surface during the spin-coating process, as well as inhibiting shedding that may occur due to solvent washing during the device preparation process. SACS SAMs heighten the charge collection ability of SAMs and suppress interfacial recombination, as well as enhance the growth of the upper perovskite layer. Finally, the SACS-based SAMs device with a power conversion efficiency of 26.37%. The unencapsulated device based on SACS SAMs can be stored for at least 5000 h with little degradation in performance.
研究领域:
材料科学
·
能源技术
·
界面化学
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DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 45
·35448-35452
·
IF 3.84
Xuejuan Chen,Xiaojing Bai,Huiyan Li,Bailin Zhang
An aptamer-based microcantilever array sensor for detection of fumonisin B-1 (FB1) was developed. The sensing cantilevers in the array were functionalized with self-assembled monolayers (SAMs) of thiolated FB1-specific aptamer, while the reference cantilevers were modified with 6-mercapto-1-hexanol SAMs to eliminate interference from the environment by detecting the deflection induced by nonspecific interactions. This differential deflection amplitude between sensing and reference cantilevers shows a linearity relation with the concentration of FB1 in the range from 0.1 to 40 μg mL−1, with a limit of detection of 33 ng mL−1 (S/N = 3). The sensor exhibits good specificity over ochratoxin A (OTA) and deoxynivalenol (DON). This biosensor provides a promising approach to detect FB1 in food and agricultural products.
研究领域:
生物传感器
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食品安全
·
分析化学
·
毒理学
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2026
·
IF 29.1
Chongyu Zhong,Junbo Wang,Zhangsheng Shi,Wenjian Yan,Fengwei Wang,Qingyun He,Mengyang Wu,Lei Li,Xiangru Zhao,Yang Jiang,Jingya Lai,Chengcheng Li,Jiupeng Cao,Tianshi Qin,Wei Huang,Renzhi Li,Fangfang Wang
All-perovskite tandem solar cells (all-PSK TSCs) offer a promising route to surpass single-junction efficiency limits, yet the performance of wide-bandgap (WBG) subcells remains constrained by inadequate interfacial engineering. In particular, the molecular orientation and packing of self-assembled monolayers (SAMs) can significantly influence perovskite film formation and device performance. Here, we rationally design a series of carbazole-based SAMs and identify a bicarbazole-core molecule, 9,9-DCz, that adopts a predominantly upright orientation on indium tin oxide (ITO), in contrast to the conventional flat-lying alignment. This vertical configuration facilitates denser surface coverage, favorable energy-level alignment, and reduced non-radiative recombination in the WBG perovskite layer. As a result, we achieve a certified power conversion efficiency (PCE) of 19.95% (champion 20.81%) for the WBG subcell (1.77 eV, 0.0396 cm 2 ), and 28.59% for the all-PSK tandem device. Our findings indicate that upright SAMs orientation as an effective design principle for high-performance WBG and tandem perovskite photovoltaics.
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DOI
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Jiawei Zhan,Qinyi Zhang,Huazhong Wang,Shuyu Zhang,Minglin Zhang,Ying Zhang,Tingna Fan,Pengyun Zhang,Huizhen Ke
The interfacial properties of the hole transport layer (HTL) are absolutely critical for perovskite solar cells (PSCs) nowadays. [4-(3,6-Dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) is widely used HTL within the class of self-assembled materials. However, during its self-assembly process, Me-4PACz tends to form molecular clusters and micelles on indium tin oxide (ITO), leading to insufficient coverage. Therefore, we propose a co-assembled monolayer (Co-SAM) strategy via co-depositing phenylphosphonic acid (PPA) or its derivatives as co-dopants with Me-4PACz, the intermolecular steric hindrance between phenyl and carbazole groups effectively suppresses Me-4PACz aggregation. Simultaneously, the phosphonic acid groups of both molecules form a synergistic dual-anchoring effect, significantly enhancing HTL uniformity and coverage. Furthermore, active substituents (-OH, -NH 2 , -Br) in the dopants can passivate uncoordinated Pb 2+ ions and iodine vacancies at the perovskite interface, thereby optimizing the HTL/perovskite contact and improving carrier extraction ability. Results show that inverted devices based on Me-4PACz+BrPPA Co-SAM achieve a power conversion efficiency (PCE) of 23.73%, representing a substantial increase from 21.39% while maintaining excellent stability. This strategy provides a new direction for developing high-performance Co-SAM and advancing the industrialization of PSCs. Graphical In this contribution, a novel Co-SAM strategy is employed by introducing phenylphosphonic acid and its derivatives into Me-4PACz solution to suppress its molecular clustering, thereby optimizing the FAPbI 3 perovskite layer. The resulting device achieve a PCE of 23.73% and demonstrate exceptional long-term stability.
研究领域:
光伏技术
·
材料科学
·
纳米技术
·
能源材料
·
半导体器件
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2014
·
IF 2.129
Xiangying Sun,Bin Liu,Chuanxiao Yang,Congcong Li
In this work we designed a fluorescent self-assemblied multilayers, with thrombin aptamers and ssDNA as aptamer fixed onto the outermost layer, respectively. This multilayers can effectively sense biomolecules by interfacial florescence resonance energy transfer from multilayers to graphene oxide. High fluorescence quenching efficiency of graphene oxide and self-assemblied membrane’ concentration results in good sensitivity for biosensing. A new interfacial sensing method with extremely high sensitivity for thrombin and DNA sequence was established, and the detection limit for thrombin and DNA was 16.2 pM and 72.6 fM, respectively.
研究领域:
生物传感器
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Dongfang Xu,Meizi Wu,Yimin Bai,Baihui Wang,Hui Zhou,Zihao Fan,Na Zhang,Jieke Tan,Hongxiang Li,Hongtao Bian,Zhike Liu
Recently, the inverted CsPbI 3 perovskite solar cells (PSCs) have attracted extensive attentions due to their potential to combine with silicon solar cells for tandem devices with theoretical power conversion efficiency (PCE) of 44%. However, the reported self-assembled molecules (SAMs) as hole selected layer for inverted PSCs have poor wettability and serious agglomeration, which greatly limits the efficiency and stability of PSCs. To address above problem, niobium pentachloride (NCL) is applied to prevent SAMs agglomeration for a homogenous SAMs film with a hydrophilic surface. The optimized SAMs surface facilitates the deposition of the cesium lead triiodide (CsPbI 3 )film with an enhanced referred orientation, suppressed defects, and released stress. Consequently, the NCL-treated CsPbI 3 PSCs achieved a champion PCE of 21.24%, which is the highest PCE value for inverted all-inorganic PSCs. The optimized device maintained 97.61% initial PCE after 1000 h storage in air, and 92.27% initial PCE after 1000 h tracking at the maximum power point (MPP).
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Bohan Shan,Yunhan Hu,Tongzhou Xu,Zhengyuan Zhao,Haodong Zhong,Yunhan Ling,Weipeng Wang,Zhengjun Zhang
The full release of surface-enhanced Raman spectroscopy (SERS) potential relies on modification of the substrate surface. However, chemical functionalization on silver substrates has, in some cases, resulted in anomalous behaviors that are difficult to explain. In this study, we investigate the role of Ag+ leaching from a silver surface in disrupting the performance of carboxyl-terminated self-assembled monolayers (SAMs). Using 4-mercaptobenzoic acid (4-MBA) as a model, we demonstrate that Ag+ released during SAM formation coordinates with carboxylate groups, inducing both aberrant SERS responses and multilayer adsorption that cannot be removed by conventional rinsing. To address this issue, we introduce a deoxygenation treatment─immersing freshly deposited AgNRs in KBH4 solution under inert atmosphere─to remove surface oxides and suppress Ag+ release. Treated Ag-4-MBA nanosensors exhibit restored, stable, and accurate pH responsiveness and reliably detect 30 ppm gaseous acetic acid. Our findings elucidate Ag+ interference on carboxyl and develop a robust strategy to enhance the reliability of silver-based SERS sensors, paving the way for their broader applications in molecular sensing.
研究领域:
分析化学
·
纳米生物技术
·
表面科学
·
分子传感
·
材料化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2019
·
IF 4.916
Wei He,Xiangying Sun,Bin Liu,Jiangshan Shen
In this paper, deoxyribonucleic acid (DNA) with different lengths were used to control the distance between carbon dots (CDs) and silver nanoparticles (AgNPs) in self-assembled multilayers (SAMs). Surface-enhanced fluorescence and fluorescence resonance energy transfer (SEF-FRET) could be achieved based on changing DNA strands. The fluorescence intensity of CDs SAMs with 6-base DNA strands could be enhanced up to ca. 5.6 times by AgNPs. As-fabricated CDs SAMs with excellent luminescent properties, superior stability have been employed for the development of a label-free fluorescence sensing platform for DNA detection. Since DNA would hybridize with the complemented one which was attached on the surface of SAMs, resulting in a close distance between CDs and AgNPs, FRET could thus occur between AgNPs and CDs, resulting in quenching the fluorescence of CDs SAMs. This sensitive sensing platform could show excellent analytical performance for detecting DNA with a linear response ranging from 93.07 pM to 5.433 nM and a detection limit of 16.36 pM, which could be further employed to probe human blood samples. This could prove a promising method for the detection of DNA.
研究领域:
生物化学
·
纳米技术
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
WEAR
·
2026
·
IF 7.2
Qingke Yu,Weisheng Zheng,Jiangtao Yu,Yan Lou,Pan Guo,Guijian Huang,Mingyu Liu
Micro moulds are widely used in the fabrication of micro/nano structures, where wear resistance is critical. This study presents a mixed phosphonic acid self-assembled monolayers (SAMs)-modified Zr-Cu-Al-Ni bulk metallic glass (BMG), which not only retains hydrophobic properties but also demonstrates exceptional high-temperature tribological performance. The wear behavior and mechanisms were systematically studied in the range from room temperature (RT) to 250 °C. Tribological tests were conducted using a multifunctional friction and wear tester in a ball-on-disk configuration, with polyetheretherketone (PEEK) balls as the counterface material against both bare and SAMs-modified Zr-based BMG specimens. The evolution of wear mechanisms in the PEEK-SAMs-modified BMG tribosystem at different temperatures was analyzed, particularly focusing on the coupled effects of the PEEK glass transition temperature and the melting and decomposition temperatures of SAMs on the tribosystem. Results demonstrate that the wear rate of Zr-Cu-Al-Ni BMG exhibits a progressive decrease within the RT to 140 °C range, declining from 53.26 × 10 −6 mm 3 N −1 m −1 to 0.156 × 10 −6 mm 3 N −1 m −1 .At RT, abrasive and minor oxidative wear dominate. Between 90 °C and 140 °C, molten SAMs films provide stable lubrication, with the friction coefficient dropping to 0.004 at 110 °C, indicating full lubrication, while maintaining hydrophobicity. At 150 °C, exceeding the glass transition temperature of the ball material (PEEK), the ball softens and increases the wear rate to 0.324 × 10 −6 mm 3 N −1 m −1 . The wear mechanism in this stage is still dominated by oxidative wear due to high temperature. Interestingly, at 200-250 °C, the friction coefficient follows a different trend, initially increasing, then decreasing, and stabilising after 800-1000 s. At stabilization, the friction coefficient matches that of unmodified BMG, while the wear rate rises to 17.205 × 10 −6 mm 3 N −1 m −1 , attributed to the thermal decomposition of SAMs and lubrication film failure. sam softening promotes adhesive wear and becomes the dominant mechanism. Meanwhile, interfacial property analysis systematically reveals the temperature-dependent effects on the chemical bonding, molecular ordering, and adsorption density of SAMs, elucidating their collective impact on wear evolution. This study demonstrates the exceptional wear resistance of SAMs-modified Zr-Cu-Al-Ni BMG, particularly at 110 °C, and further reveals that molecular interface engineering provides a novel design strategy for high-temperature wear-resistant metallic systems beyond conventional bulk strengthening approaches.
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DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Wenjing Wang,Hao Liang,Ye Ding,Haobo Wu,Wei Zhou,Xin Wen,Mingyu Ma,Wenzhuo Li,Gaoqi Liu,Siyu Ye,Weixuan Liu,Zhiyi Yao,Haitao Lang,Yunlong Liu,Ruiqi Xu,Wenjia Zhou,Xunzhong Wang,Zhijun Ning
Self-assembled monolayers (SAMs) have emerged as highly promising hole transport layers for inverted perovskite solar cells, owing to their low parasitic absorption and effective charge extraction. However, their inherent strong hydrophobicity often inhibits the quality and uniformity of perovskite films and induces defects at the buried interface. In this study, a chlorine-substituted all-hydrophilic molecule is introduced to modify the buried interface. Such decoration transforms the hydrophobic SAM into a super-hydrophilic surface, significantly enhancing the quality and uniformity of perovskite films. This chlorine-substituted molecule exhibits a strong coordination with lead ions and effectively passivates defects at the buried interface of perovskite films. As a result, the single-junction wide-bandgap (1.67 eV) perovskite solar cell achieves a power conversion efficiency of 23.97%, the highest value achieved for MeO-2PACz-based devices. Furthermore, the perovskite-silicon tandem solar cell reaches an efficiency of 31.12%. Additionally, the applicability of chlorine-functionalized all-hydrophilic molecule at the buried interface modification is demonstrated to various SAMs (4PADCB, 2PACz and Me-4PACz) and narrower- or wider-bandgap (1.61, 1.68, and 1.72 eV) perovskite solar cells. This work presents a promising strategy to overcome the challenges associated with SAM-based perovskite solar cells, paving the way for further performance advancement.
研究领域:
材料科学
·
光伏技术
·
表面化学
·
纳米材料
·
能源材料
·
半导体器件
·
界面工程
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DOI
高影响因子
Phytopathology Research
·
2025
·Vol. 7
·期 1
·1-18
·
IF 3.5
Shan Jiaxin,Su Fan,Yin Jinyao,Liu Yuhan,Zhu Xuehuan,Zuo Minghao,Liu Wenbo,Lin Chunhua,Li Xiao,Miao Weiguo
Phytopathogens secrete effector proteins that disrupt plant immunity. Phytohormones, such as ethylene, function as immune signals that regulate plant responses to phytopathogens. However, the mechanisms by which powdery mildew fungi utilize effectors to manipulate ethylene signaling remain poorly understood. This study reports that Eae1, an effector from the powdery mildew fungus Erysiphe quercicola , can reduce ethylene levels and attenuate the immune response in rubber trees ( Hevea brasiliensis ), thereby promoting fungus infection. Notably, Eae1 shares homologs with effectors from other powdery mildew fungi. Our findings indicate that the Eae1 transcription can be induced by enhanced ethylene signaling. Eae1 is translocated to plant chloroplasts, where it destabilizes Hevea brasiliensis S-adenosyl-L-methionine synthetase, a key enzyme in ethylene biosynthesis, leading to reduced ethylene production. The chloroplast-localized protein Toc159/AIG1 (AIG1) may facilitate this interaction. Overall, our study reveals a mechanism by which powdery mildew fungi disrupt ethylene-mediated resistance in host plants.
研究领域:
植物病理学
·
分子植物-微生物互作
·
植物激素信号
·
微生物效应子生物学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）