Fabrication of long-range ordered, broccoli-like SERS arrays and application in detecting endocrine disrupting chemicals

被引:53
作者
Chen, Jing [1 ,2 ]
Qin, Gaowu [1 ]
Shen, Wen [2 ]
Li, Yiyan [3 ]
Das, Biswajit [2 ]
机构
[1] Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Univ Nevada, Howard R Hughes Coll Engn, Nevada Nanotechnol Ctr, Las Vegas, NV 89154 USA
[3] Univ Nevada, Dept Elect & Comp Engn, Las Vegas, NV 89154 USA
基金
中国国家自然科学基金;
关键词
ENHANCED RAMAN-SCATTERING; SINGLE-MOLECULE; SPECTROSCOPY SERS; GOLD; NANOPARTICLES; NANOSTRUCTURES; EXPOSURE; TAGS; MICROORGANISMS; MICROSPHERES;
D O I
10.1039/c4tc02224f
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Periodic broccoli-shaped Au and Ag surface-enhanced Raman spectroscopy (SERS) arrays were fabricated by combining ordered SiO2 colloidal crystal templates with the physical deposition technique. The SiO2 colloidal crystal-assisted Au and Ag SERS substrates have a long-range, adjustable periodic structure and a clean surface without incorporating any reductants or surfactant chemicals. Different from depositing directly on the flat substrates, the colloidal crystal-assisted nanostructure array has a larger effective surface area under the same projected area of laser irradiation, which exposes more "hot spots". An increased roughness and a larger surface area have also been created as the highly bumpy surface feature of the broccoli-shaped SERS morphologies, resulting in a greater Raman amplification than the conventional metal film over nanosphere (MFON). SERS performances by Au and Ag SERS arrays reveal that the long-range broccoli-like morphology is a promising SERS platform as it is highly sensitive, reproducible and stable. The colloidal crystal-assisted Ag SERS array has a slightly higher enhancement factor (EF) than the Au SERS array, and they both are of the order of 10(7) enhancement. Compared to our previous work, which directly deposited noble metal nanoparticles onto flat substrates, the EF of the colloidal crystal-assisted SERS array is improved by one to two orders of magnitude. Finite-difference time-domain (FDTD) simulation was performed to estimate the electromagnetic field distribution. Finally, two endocrine disrupting chemicals (EDCs) (dioctyl phthalate (DOP) and dibutyl phthalate (DBP), homologous series) at different concentrations were successfully identified by Au and Ag SERS arrays with the detection limits of 0.24 x 10(-9) M and 0.22 x 10(-9) M, respectively. This study suggests that the broccoli-like Au and Ag SERS arrays are promising candidates for chemical sensing and this SERS substrate fabrication technique can be accessible to the standard industrial processes.
引用
收藏
页码:1309 / 1318
页数:10
相关论文
共 80 条
[1]   A high-throughput method for controlled hot-spot fabrication in SERS-active gold nanoparticle dimer arrays [J].
Alexander, Kristen D. ;
Hampton, Meredith J. ;
Zhang, Shunping ;
Dhawan, Anuj ;
Xu, Hongxing ;
Lopez, Rene .
JOURNAL OF RAMAN SPECTROSCOPY, 2009, 40 (12) :2171-2175
[2]   Silver-coated magnetite-carbon core-shell microspheres as substrate-enhanced SERS probes for detection of trace persistent organic pollutants [J].
An, Qiao ;
Zhang, Peng ;
Li, Jun-Mei ;
Ma, Wan-Fu ;
Guo, Jia ;
Hu, Jun ;
Wang, Chang-Chun .
NANOSCALE, 2012, 4 (16) :5210-5216
[3]  
[Anonymous], J NANOTECHNOL
[4]   An ultrahigh vacuum complementary metal oxide silicon compatible nonlithographic system to fabricate nanoparticle-based devices [J].
Banerjee, Arghya ;
Das, Biswajit .
REVIEW OF SCIENTIFIC INSTRUMENTS, 2008, 79 (03)
[5]   Label-Free Detection of DNA Hybridization Using Surface Enhanced Raman Spectroscopy [J].
Barhoumi, Aoune ;
Halas, Naomi J. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2010, 132 (37) :12792-12793
[6]   On a theory of the van der Waals adsorption of gases [J].
Brunauer, S ;
Deming, LS ;
Deming, WE ;
Teller, E .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1940, 62 :1723-1732
[7]   Controlled Plasmonic Nanostructures for Surface-Enhanced Spectroscopy and Sensing [J].
Camden, Jon P. ;
Dieringer, Jon A. ;
Zhao, Jing ;
Van Duyne, Richard P. .
ACCOUNTS OF CHEMICAL RESEARCH, 2008, 41 (12) :1653-1661
[8]   Fabrication of tunable Au SERS nanostructures by a versatile technique and application in detecting sodium cyclamate [J].
Chen, Jing ;
Shen, Wen ;
Das, Biswajit ;
Li, Yiyan ;
Qin, Gaowu .
RSC ADVANCES, 2014, 4 (43) :22660-22668
[9]   One-step fabrication of sub-10-nm plasmonic nanogaps for reliable SERS sensing of microorganisms [J].
Chen, Jing ;
Qin, Gaowu ;
Wang, Jiansheng ;
Yu, Jiangyu ;
Shen, Bo ;
Li, Song ;
Ren, Yuping ;
Zuo, Liang ;
Shen, Wen ;
Das, Biswajit .
BIOSENSORS & BIOELECTRONICS, 2013, 44 :191-197
[10]   Fabrication of Large-Area, High-Enhancement SERS Substrates with Tunable Interparticle Spacing and Application in Identifying Microorganisms at the Single Cell Level [J].
Chen, Jing ;
Shen, Bo ;
Qin, Gaowu ;
Hu, Xianwei ;
Qian, Lihua ;
Wang, Zhaowen ;
Li, Song ;
Ren, Yuping ;
Zuo, Liang .
JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (05) :3320-3328