POLYMER
·
2022
·
IF 4.432
Hanwen Lai,Guangcheng Huang,Xin Tian,Yadong Liu,Shengxiang Ji
The influence of line width roughness (LWR) and line edge roughness (LER) on the reliability and performance of transistors becomes more and more important in the semiconductor fabrication as the critical dimension continues shrinking. Directed self-assembly of block copolymers (DSA of BCPs) is a potential solution for next generation lithography, however, it still lacks research on the influencing factors of LER and LWR in DSA. Here we investigate the effect of the molecular weight distribution ( Ɖ ), normalized pattern period ( L S / L O ), pattern duty cycle (W/ L S ) and annealing time on the LER and LWR of domain boundaries in assembled poly(styrene- block -methyl methacrylate) (PS- b -PMMA) films on chemical patterns. The assembly kinetics is faster when the Ɖ of PS- b -PMMA is larger, while the Ɖ of PS- b -PMMA does not affect the L S / L O window for defect-free assembly when the annealing time is sufficient. Ɖ is the most critical parameter to control LER and LWR, and both increase with the increase of Ɖ on chemical patterns with same L S / L O . Besides Ɖ , L S / L O also plays an important role in the control of LER and LWR and the roughness increases with the increase of L S / L O . In addition, the annealing time and W/ L S of chemical pattern have little effect on LER and LWR. This will provide insight to engineer LER and LWR of block copolymer domains in DSA.
研究领域:
材料科学
·
半导体制造
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 14
·e202300180
·
IF 8.4
Yinjian Zheng,Zhiyuan Wang,Peng Chen,Wenbiao Zhang,Qingsheng Gao
Graphical Roughness-dependence of Cu electrodes is for the first time identified in the electro-reductive coupling of nitro and carbonyl compounds. With increased roughness, the selectivity of nitrones decreases, while that of imines increases, thanks to the feasible control over the reduction of nitroarenes to hydroxylamines or amines on Cu I /Cu 0 interfaces. The electro-reductive coupling of nitro and carbonyl compounds enables a facile, environmentally friendly and energy benign transformation toward value-added nitrones or imines, but the selectivity is still challenging. Here, the surface roughness of Cu electrodes is introduced for the first time as the determinant to switch products from nitrones to imines owing to the controllable reduction of nitroarenes to hydroxylamines or amines on tailored Cu I /Cu 0 interfaces. The roughness-dependent selectivity, that is the decrease of nitrones and the increase of imines with enhanced roughness, is visible in the electro-reductive coupling of nitrobenzene and furfural. Thus, the high selectivity of nitrone (98 %) and imine (80 %) can be achieved on a surface smooth Cu foil and the one electrochemically roughened in the presence of I − , respectively. Such roughness-dependence of nitrone/imine selectivity on Cu electrodes is further verified in a wide substrate scope, highlighting the promise of surface/interfacial engineering for electrochemical synthesis.
研究领域:
电化学
·
有机合成
·
材料科学
·
表面科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Xiangquan Wu,Qin Lian,Dichen Li,Xiaoning He,Jiali Meng,Xiaodong Liu,Zhongmin Jin
Mask projection stereolithography can be used to fabricate complex ceramic parts layer by layer through the photopolymerisation of ceramic suspensions. The broadening or lateral overcure of the curing shape occurs because of light scattering effects. Achieving a better dimension and strength quality by adjusting light energy delivery in the boundary mask area has been insufficiently investigated thus far. In this study, the conventional mask was segmented into boundary and interior masks. The exposure time and power of the boundary mask (two pixels wide) were varied to investigate the effects of segmented exposure. The segmented exposure constrained the dimension errors to a width of within two pixels for a feature dimension of less than 1200 µm. It further smoothed the lateral surface of the green part to achieve Ra values of below 6 µm. Moreover, enhancing the boundary mask increased the flexural strength and Weibull modulus to 248 MPa and 11.1, respectively. The results indicate that segmented exposure can potentially be used in complex lattice ceramic structures.
研究领域:
生物医学工程
·
材料科学
·
增材制造
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2024
·
IF 4.9
Mianyan Yang,Zhijun Zhang
The effect of surface roughness on the detachment between the bubbles and the glass beads (soda-lime) was comprehensively investigated. Glass beads with dimensions of −1.20 + 1.12 mm were acid etched to achieve varying degrees of surface roughness, followed by silanation reactions conducted for different immersion times. The characterization of surface roughness was conducted using a ContourGT-K 3D optical microscope. Measurements of receding contact angle, induction time and detachment force were conducted to assess the influence of surface roughness on bubble and glass bead attachment/detachment. It is observed that the etching surface of glass beads with uniform protrusions and depressions, the hydrophobic glass beads exhibited shorter induction time, larger contact angle and higher critical detachment force. However, the stability of aggregates of bubbles and hydrophilic glass beads was reduced, making them prone to detachment. Moreover, larger protrusions and depressions on hydrophobic glass bead surfaces with increasing etching time, resulted in an increase in induction time, a decrease in receding contact angle and critical detachment force. The stability of bubbles and hydrophilic glass bead aggregates remained unchanged.
研究领域:
材料科学
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
Particuology
·
2021
·
IF 3.067
Zhanglei Zhu,Yafeng Fu,Wanzhong Yin,Haoran Sun,Keqiang Chen,Yuan Tang,Bin Yang
Surface roughness has a significant influence on mineral flotation. The assisting effect of surface roughness on minerals flotation is extensively investigated from its physical properties (e.g., the existing form of asperity and its size), however, the associated effect on mineral flotation based on the differences in surface chemical property caused by surface roughness has been rarely touched. With such a question in mind, in this study, we investigated the flotation recoveries of two batches of magnesite particles with varying degree of surface roughness produced by two different mills, and associated the flotation performances to their surface chemical properties (amount of adsorption sites for the collector) via a series of detections, including Scanning Electron Microscope-Energy Dispersive Spectrometry (SEM-EDS) observations, X-ray photoelectron spectroscopy (XPS) analysis, adsorption capacity tests, and contact angle measurements. Finally, we concluded that rougher magnesite particles could provide more active sites (Mg 2+ ) for a larger capacity of sodium oleate (NaOL), thereby improving the hydrophobicity and floatability.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Zhanglei Zhu,Zhen Li,Wanzhong Yin,Bin Yang,Ningning Zhang,Jinzhou Qu,Songjiang Chen,Jing Chang,Yuexian Yu,Lijun Liu
Although the effect of surface roughness on the floatability of a single mineral has been investigated extensively, a systematic study for the effect of surface roughness on the flotation separation of different minerals, e.g., flotation recovery, has never been dwelled. To fulfill this gap, in this study, the effect of surface roughness on the flotation separation of hematite from quartz was investigated with a series of experiments and detections. Micro-flotation experiments demonstrated that hematite particles with higher roughness resulted in higher recoveries for both hematite and quartz, but the improvement of hematite recovery was more significant, which promoted the flotation separation of hematite from quartz with a higher separation index (SI). Adhesion force measurements revealed that after interacting with 125 mg/L sodium oleate at pH 9, increasing nano-scaled roughness improved the hydrophobicity of hematite surface, and reduced the adhesion force of water droplet on hematite surface. Scanning Electron Microscope – Energy Dispersive Spectrometer observations confirmed that increasing nano-scaled roughness increased the number of fine quartz particles coating on hematite surface. Combined with the analysis of adhesion of water droplet and observation of fine particles coating on hematite surface, the effect of surface roughness on minerals flotation separation could be better understood.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 12
·2206528
·
IF 13.3
Titao Jing,Shuchang Wang,Haiyuan Yuan,Yujue Yang,Ming Xue,Bingang Xu
Gel-based triboelectric nanogenerator (TENG) has demonstrated promising potentials in stretchable electronics owing to gel electrodes’ intrinsic softness, stretchability, and conductivity. However, delamination between gel and elastomer layers in deformations remains a considerable challenge for gel-based TENG, which most often induces structure failure. Herein, gels are regarded as adhesives and further effectively enhances interfacial bonding strength by a rough interface in adhesives’ view, which exploits gels’ liquid-to-solid transformation. This method just needs surface roughness of elastomer, which avoids chemical modification. Moreover, this method is effective to both organogel with good stickiness and hydrogel with weak stickiness, demonstrating wide applicability to different gels. Owing to the tough gel/elastomer interfacial bonding, TENG-Rough largely solves delamination problem under various deformations and the corresponding output performances of TENG-Rough are also maintained, implying a robust stretchable TENG device for reliable energy harvesting. This work demonstrates a general and facile method to enhance interfacial bonding in an adhesives’ way, which provides a view for addressing delamination problem in gel-based TENGs and other kinds of gel-based devices.
研究领域:
材料科学
·
纳米技术
·
能源工程
·
机械工程
·
电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Zhanglei Zhu,Wanzhong Yin,Donghui Wang,Haoran Sun,Keqiang Chen,Bin Yang
Surface roughness affects both the adsorption capacity of collector and mineral flotation separation. To investigate the role of surface roughness in quartz flotation, in this study, quartz particles were ground by different mills to produce two quartz samples with different nano-sized roughness, which was quantified with atomic force microscopy (AFM). Flotation experiments were carried out using CaCl 2 as an activator and sodium oleate (NaOL) as a collector. The results of flotation experiments showed an excellent performance with high recoveries for the rough quartz particles in contrast to the case with the smooth ones. Surface chemical aspects for the role of surface roughness in flotation were investigated through measurements of X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscope-Energy Dispersive Spectrometry (SEM-EDS), collector adsorption capacity and contact angle analysis. Both XPS and SEM-EDS results demonstrated larger adsorption capacity of Ca 2+ for the rough quartz particles due to more adsorption sites provided by larger specific surface area. The NaOL adsorption capacity results also confirmed that larger surface roughness corresponded to higher adsorption capacity of NaOL. Subsequently, the contact angle results revealed that after interacting with NaOL the rough quartz particles presented more hydrophobic. Combined with flotation tests and surface chemical analysis, it might be arrived that surface roughness affected the adsorption capacity of both Ca 2+ and NaOL, therefore impacting the wettability and floatability of quartz particles.
研究领域:
矿物加工工程
·
材料科学与工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 3
·1766-1777
·
IF 4.186
Zehua Wu,Zhixin Zhang,Yong Jia,Fei Teng,Gang Li,Feng Wang,Yuqi Jin
Surface quality of fused silica, particularly surface defect and surface roughness, is a key factor affecting the performance of high-power laser and short-wave optical instrument, and so on. Herein, the super smooth surface of fused silica with roughness of sub-angstrom level and exceedingly few submicron defects was achieved by using ultrafine nano-CeO 2 with primary particle size less than 4 nm, low secondary particle agglomeration strength, and high Ce 3+ concentration. Furthermore, CeO 2 involve in polishing process in the form of primary particle was certified by experiment. Moreover, the cause for the generation of submicron defects on fused silica surface was investigated for the first time from the perspective of secondary particle agglomeration strength of CeO 2 . The concentration of Ce 3+ in CeO 2 was characterized by the redshift of the band-gap energy, and the analysis of material removal rate (MRR) and contact angle of polished fused silica shows that Ce 3+ enhances MRR through increasing the silanol group on fused silica.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Zhikun Wang,Wentao Qu,Yunchao Peng,Jianqiang Zhang,Songqing Hu
The synergistic adsorption of carbon dot and chitosan on metal-corrosive solution interface remains complex and elusive due to their distinct architecture and chemistry. Here, copper-doped carbon dot (CuCD) and pyridine-grafted chitosan (CS-4PCA) are designed as a synergistic corrosion inhibition duo in 15 % HCl. Weight loss tests showed that the optimal CuCD (200 mg/L) and CS-4PCA (200 mg/L) individually achieved inhibition efficiencies of 67.66 % and 73.27 %, respectively. Remarkably, their binary mixture (150 mg/L CuCD + 50 mg/L CS-4PCA) exhibited a synergistic efficiency of 83.27 %, surpassing the performance of either component at the same total concentration. The addition of benzotriazole (200 mg/L) further enhanced the efficiency to 92 %. Surface characterization revealed that the CuCD/CS-4PCA composite film reduced the surface roughness of N80 steel from 32.27 μm (blank) to 8.01 μm, forming a compact protective layer. Molecular dynamics simulations demonstrated that CuCD adsorbed parallel to the Fe surface, while CS-4PCA chains filled the gaps, synergistically inhibiting corrosive particle penetration. This work provides insights into the design of high-performance compound inhibitors for harsh acidic environments.
研究领域:
材料科学
·
腐蚀与防护
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Yang Lei,Lu Xige,Zhong Shuiping,Zhu Huanlin,Weng Wei,Tan Wen,Chi Xiaopeng
Copper foil roughness is widely regarded as an important factor affecting the performance of lithium-ion batteries, but relevant research still lacks systematic and in-depth analysis. In this paper, 6 μm copper foil is prepared by electrodeposition and compared with purchased 6 μm copper foil. The influence of different roughness on the battery performance is analyzed by the distribution of relaxation time (DRT). The results show that the roughness of homemade copper foil (1.69 μm) is slightly higher than that of purchased copper foil (1.53 μm). The initial charging specific capacity of the homemade copper foil electrode reaches 372.51 mAh g −1 , significantly higher than that of the purchased copper foil electrode (323.89 mAh g −1 ). DRT is used to analyze the electrochemical reaction kinetics of the batteries, it is found that the copper foil with a certain roughness can enhance its binding with the active substance, ensure stable and rapid conductive contact, reduce the side reaction caused by uneven lithiation, and minimize the increase in the impedance of each part during the electrode cycle, thereby ensuring stable battery operation. This study provides new insights into the application of copper foil in batteries and verifies the feasibility of homemade 6 μm copper foil.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2012
·
IF 4.542
Jing Du,Yanfeng Gao,Zhang Chen,Litao Kang,Zongtao Zhang,Hongjie Luo
Application of VO 2 to smart windows calls for an enhancement of both luminous transmittance ( T lum ) and solar transmittance modulation (Δ T sol ). These two properties are related to optical constants , microstructure and film thickness. In this article, VO 2 -based films with increased microroughness are prepared by polymer assisted deposition , and ZnCl 2 is added to the precursor solution to control the microstructure of the films. Addition of ZnCl 2 increases the microroughness of films through phase separation, which largely decreases the refraction index and the reflectivity of the films, resulting in enhanced luminous transmittance and solar transmittance modulation; two films with balanced optical performance show T lum =50.5% and Δ T sol =11.3%, and T lum =59.3% and Δ T sol =10.5%, respectively. Moreover, this kind of microstructure control has no influence on doping VO 2 , which is proven by the deposition and characterization of W-doped VO 2 -based films. By the formation of a W-doped VO 2 /F:SnO 2 /glass multilayer stack, a film shows excellent thermochromic properties and low emissivities; typically, a film with a phase transition temperature, T lum , Δ T sol of 43.4 °C, 30.0%, 8.82%, respectively, and emissivity of 0.20 for monoclinic and 0.33 for rutile phase is successfully prepared.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）