One-step machining of hierarchical micro-nano structures on Al-Mg alloy as superamphiphobic substrate for amplified SERS trace detection

2019 ◽  
Vol 6 (4) ◽  
pp. 046510 ◽  
Author(s):  
Tian Shi ◽  
Xuewu Li ◽  
Jinhui Shao ◽  
Hongxing Wang ◽  
Chuanwei Zhang ◽  
...  
Keyword(s):  
Mg Alloy ◽  
Trace Detection ◽  
Nano Structures ◽  
One Step

Improving the Mechanical Properties of AZ31 Mg Alloy by High Ratio Extrusion

2006 ◽  
Vol 503-504 ◽  
pp. 865-870 ◽  
Author(s):  
Yongjun Chen ◽  
Qu Dong Wang ◽  
Jianguo Peng ◽  
Chun Quan Zhai
Keyword(s):  
Mechanical Properties ◽  
High Strength ◽  
High Ratio ◽  
Extrusion Ratio ◽  
Mg Alloy ◽  
Fine Grained ◽  
Az31 Mg Alloy ◽  
Industry Applications ◽  
One Step ◽  
The One

Experiments were conducted both to evaluate the potential for grain refinement, the subsequent mechanical properties at room temperature in samples of AZ31 Mg alloy and also to investigate the relationship between one-step and two-step high ratio extrusion (HRE). The one-step HRE was undertaken using a high extrusion ratio of 70:1 at 250, 300 and 350°C. And the two-step HRE was conducted with an extrusion ratio of 7 for the first step at 250, 300 and 350°C, followed by a second-step extrusion with an extrusion ratio of 10 at 250, 300 and 350°C. The initial grain size in the AZ31 ingot was 100μm and that after one-step HRE became similar to 5μm, after two-step HRE at 250, 300 and 350°C were 2, 4, 7μm, respectively, resulting in superior mechanical properties at ambient temperature. The microstructure of two-step HRE was finer and uniformer than that of one-step HRE and the strength of one-step and two-step HRE were similar, moreover, the elongation of one-step HRE was improved markedly than that of two-step HRE. Dynamic recrystallization and adjacent grain broking during HRE is introduced to explain the effects of one-step and two-step HRE on the microstructure and mechanical properties of AZ31 Mg alloy. The current results imply that the simple HRE method might be a feasible processing method for industry applications, and the multiply steps extrusion are effective to fabricate high strength of fine grained hcp metals.

Low-cost Micro- and Nano-structures in Porous Nanomaterials Realized by Direct Imprinting of Porous Substrates

2011 ◽  
Vol 1340 ◽  
Author(s):  
Judson D. Ryckman ◽  
Marco Liscidini ◽  
J. E. Sipe ◽  
S. M. Weiss
Keyword(s):  
Room Temperature ◽  
Low Cost ◽  
Substrate Material ◽  
Nano Structures ◽  
One Step ◽  
Temperature And Pressure ◽  
Feature Resolution ◽  
Porous Nanomaterials ◽  
Very High ◽  
Porous Substrates

ABSTRACTWe present a simple one-step methodology for direct structuring of porous nanomaterials on the micro- and nano-scale. Our technique, direct imprinting of porous substrates (DIPS), relies on the application of a pre-patterned and reusable stamp to directly imprint porous substrates. DIPS is performed at room temperature and pressure in less than one minute, and circumvents the conventional requirement for resist processing and etching procedures. It is shown that arbitrarily shaped patterns and structures can be transferred to porous nanomaterials with a very high (sub-100nm) feature resolution that is primarily limited by the pore dimensions of the substrate material. DIPS is demonstrated on a wide variety of porous nanomaterials including metals, semiconductors, and insulators. Furthermore, DIPS can be utilized to locally modify material properties including pore dimensions, density, dielectric function, and surface roughness. Lastly, example structures fabricated by DIPS are discussed for their relevance to important applications ranging from drug delivery and imaging, to solar energy conversion, and biosensing.

scholarly journals Cascaded microsphere-coupled surface-enhanced Raman spectroscopy (CMS-SERS) for ultrasensitive trace-detection

Nanophotonics ◽  
2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Yanlin Mi ◽  
Yinzhou Yan ◽  
Mengyuan Wang ◽  
Lixue Yang ◽  
Jing He ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Limit Of Detection ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sers Substrate ◽  
Trace Detection ◽  
Excitation Light ◽  
Analytical Technique ◽  
Nano Structures ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Abstract Surface-enhanced Raman spectroscopy (SERS) has been widely investigated and employed as a powerful optical analytical technique providing fingerprint vibrational information of molecules with high sensitivity and resolution. In addition to metallic nanostructure, dielectric micro-/nano-structures with extraordinary optical manipulation properties have demonstrated capability in enhanced Raman scattering with ultralow energy losses. Here we report a facile cascaded structure composed of a large microsphere (LMS) and a small microsphere array with Ag nanoparticles as a novel hybrid SERS substrate, for the first time. The cascaded microsphere-coupled SERS substrate provides a platform to increase the molecular concentration, boost the intensity of localized excitation light, and direct the far-field emission, for giant Raman enhancement. It demonstrates the maximum enhancement factor of Raman intensity greater than 108 for the limit of detection down to 10−11 M of 4-nitrothiphenol molecules in aqueous solution. The present work inspires a novel strategy to fabricate cascaded dielectric/metallic micro-/nano-structures superior to traditional SERS substrates towards practical applications in cost-effective and ultrahigh-sensitive trace-detection.

One-step fabrication of dual functional Tb3+ coordinated polymeric micro/nano-structures for Cr(VI) adsorption and detection

2022 ◽  
Vol 423 ◽  
pp. 127166 ◽  
Author(s):  
Kun Jia ◽  
Yao Ji ◽  
Xiaohong He ◽  
Junni Xie ◽  
Pan Wang ◽  
...  
Keyword(s):  
Dual Functional ◽  
Nano Structures ◽  
One Step

Fabricating hierarchical micro and nano structures on implantable Co–Cr–Mo alloy for tissue engineering by one-step laser ablation

2018 ◽  
Vol 161 ◽  
pp. 628-635 ◽  
Author(s):  
Liguo Qin ◽  
Hongxing Wu ◽  
Junde Guo ◽  
Xinan Feng ◽  
Guangneng Dong ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Laser Ablation ◽  
Nano Structures ◽  
One Step

One-step synthesis of lamellar molybdate pillared hydrotalcite and its application for AZ31 Mg alloy protection

2009 ◽  
Vol 11 (2) ◽  
pp. 376-381 ◽  
Author(s):  
Xiang Yu ◽  
Jun Wang ◽  
Milin Zhang ◽  
Piaoping Yang ◽  
Lihui Yang ◽  
...  
Keyword(s):  
Mg Alloy ◽  
Az31 Mg Alloy ◽  
One Step

scholarly journals Forensic application of a rapid one-step tetramethylbenzidine-based test for the presumptive trace detection of bloodstains at the crime scene and in the laboratory

2016 ◽  
Vol 2 ◽  
pp. 63-74 ◽  
Author(s):  
Elisabetta De Vittori ◽  
Filippo Barni ◽  
Simon W. Lewis ◽  
Giovanni Antonini ◽  
Cesare Rapone ◽  
...  
Keyword(s):  
Crime Scene ◽  
Trace Detection ◽  
Forensic Application ◽  
One Step

scholarly journals Preparation and Corrosion Performance of PPy/Silane Film on AZ31 Magnesium Alloy via One-Step Cyclic Voltammetry

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3148
Author(s):  
Chuang Peng ◽  
Nana Cao ◽  
Ziheng Qi ◽  
Yongde Yan ◽  
Ruizhi Wu ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Magnesium Alloy ◽  
Coupling Agent ◽  
Volume Fraction ◽  
Corrosion Current ◽  
Mg Alloy ◽  
Mixed Solution ◽  
Step Cycle ◽  
Az31 Mg Alloy ◽  
One Step

PPy/silane composite film on a magnesium alloy surface was prepared by one-step cycle voltammetry. The mixed solution of methanol and water was used as the hydrolysis solvent of a γ-(2,3-glycidoxypropyl) trimethoxysilane coupling agent (KH-560). The surface morphology of the PPy/silane film, the electro-polymerization progress of KH-560 and PPy, the influence of the silane coupling agent and the corrosion behavior of the coated AZ31 Mg alloy were all investigated. The results indicated that the PPy/silane film on AZ31 Mg alloy via one-step cyclic voltammetry could provide better corrosion protection for an Mg alloy when the volume fraction of KH-560 in the hydrolysis solution was 15% and the time span of hydrolysis was 24 h with the 5.935 × 10−10 A cm−2 corrosion current density.

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