Fabrication of nanoporous silver film by dealloying Ag/α-Fe2O3 nanocomposite for surface-enhanced Raman spectroscopy

被引:14
作者
Bekana, Deribachew [1 ,2 ]
Liu, Rui [1 ]
Li, Shasha [1 ,2 ]
Liu, Jing-Fu [1 ,2 ]
机构
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, POB 2871, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
Nanoporous silver film; Iron oxide; Nanocomposite; Dealloying; Surface-enhanced Raman spectroscopy; Sudan III; FACILE FABRICATION; GOLD; SCATTERING; AG; ALLOY; SERS; METALS; NANOPARTICLES; PERFORMANCE; SUBSTRATE;
D O I
10.1016/j.snb.2019.01.114
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A facile and reliable method for fabrication of nanoporous Ag film as surface-enhanced Raman spectroscopy (SERS) substrates was developed by dealloying the low-cost Ag/alpha-Fe2O3 nanocomposite in dilute acid solution. Influencing parameters such as different dealloying solutions, electrolyte concentration and dealloying time were optimized, and a uniform nanoporous Ag film of tunable and smaller ligament size was synthesized by etching the nanocomposite in sulfuric acid as a dealloying solution, while hydrochloric acid produced coarsened Ag nanoporous structures. Besides, the ligament size of the synthesized nanoporous Ag film increased with the electrolyte concentration and dealloying time. SERS activity of the as-synthesized nanoporous Ag film was evaluated using R6G as Raman probe, and the nanoporous Ag film with smaller ligament size exhibited strong SERS activity with a SERS enhancement factor of 7.47 x 10(6). The substrate exhibited good sensitivity and uniformity (RSD, 13.3%), and practical applicability for SERS detection of Sudan III, a synthetic organic dye banned as food additives, and achieved a detection limit of 0.5 mu M. More importantly, the developed method ensures low-cost and reliable method of nanoporous materials fabrication from low-cost semiconductor based nanomaterials for applications in wide variety of fields.
引用
收藏
页码:94 / 100
页数:7
相关论文
共 51 条
[1]   Facile fabrication of silver nanoparticle decorated α-Fe2O3 nanoflakes as ultrasensitive surface-enhanced Raman spectroscopy substrates [J].
Bekana, Deribachew ;
Liu, Rui ;
Li, Shasha ;
Lai, Yujian ;
Liu, Jing-Fu .
ANALYTICA CHIMICA ACTA, 2018, 1006 :74-82
[2]   Nanoporous Gold: Understanding the Origin of the Reactivity of a 21st Century Catalyst Made by Pre-Columbian Technology [J].
Biener, Juergen ;
Biener, Monika M. ;
Madix, Robert J. ;
Friend, Cynthia M. .
ACS CATALYSIS, 2015, 5 (11) :6263-6270
[3]   Recrystallisation-accompanied phase separation in Ag-Fe and Ag-Ni nanocomposites: a route to structure tailoring of nanoporous silver [J].
Bokhonov, Boris B. ;
Dudina, Dina V. .
RSC ADVANCES, 2013, 3 (31) :12655-12661
[4]   Surface-Enhanced Raman Scattering of Silver@Nanoporous Copper Core-Shell Composites Synthesized by an In Situ Sacrificial Template Approach [J].
Chen, L. Y. ;
Zhang, L. ;
Fujita, T. ;
Chen, M. W. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (32) :14195-14199
[5]   Nanoporous Copper with Tunable Nanoporosity for SERS Applications [J].
Chen, Lu-Yang ;
Yu, Jin-Shan ;
Fujita, Takeshi ;
Chen, Ming-Wei .
ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (08) :1221-1226
[6]   Evolution of nanoporosity in dealloying [J].
Erlebacher, J ;
Aziz, MJ ;
Karma, A ;
Dimitrov, N ;
Sieradzki, K .
NATURE, 2001, 410 (6827) :450-453
[8]   3D nanoporous Ag microstructures fabricated from AgCl microcrystal templates via concerted oxidative etching/re- deposition and galvanic replacement [J].
Gatemala, Harnchana ;
Thammacharoen, Chuchaat ;
Ekgasit, Sanong ;
Pienpinijtham, Prompong .
CRYSTENGCOMM, 2016, 18 (35) :6664-6672
[9]   Fabrication and Wettability of Nanoporous Silver Film on Copper from Choline Chloride-Based Deep Eutectic Solvents [J].
Gu, C. D. ;
Xu, X. J. ;
Tu, J. P. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (32) :13614-13619
[10]   Noble metal nanomaterials: Controllable synthesis and application in fuel cells and analytical sensors [J].
Guo, Shaojun ;
Wang, Erkang .
NANO TODAY, 2011, 6 (03) :240-264