High sensitivity calixarene SERS substrates for the continuous in-situ detection of PAHs in seawater

2011 ◽  
Author(s):  
Yong-Hyok Kwon ◽  
Anna Kolomijeca ◽  
Kay Sowoidnich ◽  
Heinz-Detlef Kronfeldt
Keyword(s):  
High Sensitivity ◽  
Sers Substrates ◽  
In Situ Detection

scholarly journals Nanopipette/Nanorod-Combined Quartz Tuning Fork–Atomic Force Microscope

Sensors ◽  
2019 ◽  
Vol 19 (8) ◽  
pp. 1794 ◽  
Author(s):  
Sangmin An ◽  
Wonho Jhe
Keyword(s):  
Atomic Force Microscope ◽  
Tuning Fork ◽  
High Sensitivity ◽  
Quartz Tuning Fork ◽  
Force Sensor ◽  
Au Nanoparticle ◽  
Ambient Conditions ◽  
Atomic Force ◽  
In Situ Detection

We introduce a nanopipette/quartz tuning fork (QTF)–atomic force microscope (AFM) for nanolithography and a nanorod/QTF–AFM for nanoscratching with in situ detection of shear dynamics during performance. Capillary-condensed nanoscale water meniscus-mediated and electric field-assisted small-volume liquid ejection and nanolithography in ambient conditions are performed at a low bias voltage (~10 V) via a nanopipette/QTF–AFM. We produce and analyze Au nanoparticle-aggregated nanowire by using nanomeniscus-based particle stacking via a nanopipette/QTF–AFM. In addition, we perform a nanoscratching technique using in situ detection of the mechanical interactions of shear dynamics via a nanorod/QTF–AFM with force sensor capability and high sensitivity.

scholarly journals In-Situ Grown Silver Nanoparticles on Nonwoven Fabrics Based on Mussel-Inspired Polydopamine for Highly Sensitive SERS Carbaryl Pesticides Detection

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 384 ◽  
Author(s):  
Zhiliang Zhang ◽  
Tiantian Si ◽  
Jun Liu ◽  
Guowei Zhou
Keyword(s):  
Silver Nanoparticles ◽  
Collection Efficiency ◽  
High Sensitivity ◽  
Sers Substrate ◽  
Analytical Sensitivity ◽  
Sers Substrates ◽  
Rapid Sampling ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

The rapid sampling and efficient collection of target molecules from a real-world surface is fairly crucial for surface-enhanced Raman scattering (SERS) to detect trace pesticide residues in the environment and in agriculture fields. In this work, a versatile approach was exploited to fabricate a flexible SERS substrate for highly sensitive detection of carbaryl pesticides, using in-situ grown silver nanoparticles (AgNPs)on non-woven (NW) fabric surfaces based on mussel-inspired polydopamine (PDA) molecules. The obtained NW@PDA@AgNPs fabrics showed extremely sensitive and reproducible SERS signals toward crystal violet (CV) molecules, and the detection limit was as low as 1.0 × 10−12 M. More importantly, these NW@PDA@AgNPs fabrics could be directly utilized as flexible SERS substrates for the rapid extraction and detection of trace carbaryl pesticides from various fruit surfaces through a simple swabbing approach. It was identified that the detection limits of carbaryl residues from apple, orange, and banana surfaces were approximately decreased to 4.02 × 10−12, 6.04 × 10−12, and 5.03 × 10−12 g, respectively, demonstrating high sensitivity and superior reliability. These flexible substrates could not only drastically increase the collection efficiency from multifarious irregular-shaped matrices, but also greatly enhance analytical sensitivity and reliability for carbaryl pesticides. The fabricated flexible and multifunctional SERS substrates would have great potential to trace pesticide residue detection in the environment and bioscience fields.

An in situ approach for facile fabrication of robust and scalable SERS substrates

Nanoscale ◽  
2014 ◽  
Vol 6 (13) ◽  
pp. 7232-7236 ◽  
Author(s):  
Yi-Chung Wang ◽  
Joseph S. DuChene ◽  
Fengwei Huo ◽  
Wei David Wei
Keyword(s):  
High Sensitivity ◽  
Sers Substrate ◽  
Biological Detection ◽  
Sers Substrates ◽  
Widespread Implementation ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Facile Fabrication ◽  
Enhanced Raman Scattering

The widespread implementation of surface enhanced Raman scattering (SERS) techniques for chemical and biological detection requires an inexpensive, yet robust SERS substrate with high sensitivity and reproducibility.

Two-dimensional flower-shaped Au@Ag nanoparticle arrays as effective SERS substrates with high sensitivity and reproducibility for detection of thiram

2020 ◽  
Vol 8 (11) ◽  
pp. 3838-3845 ◽  
Author(s):  
Changchang Xing ◽  
Shichuan Zhong ◽  
Jie Yu ◽  
Xuejiao Li ◽  
An Cao ◽  
...  
Keyword(s):  
Chemical Reduction ◽  
High Sensitivity ◽  
Two Dimensional ◽  
Nanoparticle Arrays ◽  
Ag Nanoparticle ◽  
Sers Substrates

A simple and controllable route is presented for the construction of two-dimensional (2D) flower-shaped Au@Ag nanoparticle (NP) arrays through in situ chemical reduction growth of Ag nanosheets on Au NP arrays.

scholarly journals Controllable In-Situ Growth of Silver Nanoparticles on Filter Paper for Flexible and Highly Sensitive SERS Sensors for Malachite Green Residue Detection

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 826 ◽  
Author(s):  
Lingzi Zhang ◽  
Jun Liu ◽  
Guowei Zhou ◽  
Zhiliang Zhang
Keyword(s):  
Silver Nanoparticles ◽  
Malachite Green ◽  
High Sensitivity ◽  
In Situ Growth ◽  
Sers Substrates ◽  
Universal Approach ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Filter Papers

In this work, a series of highly flexible and sensitive surface-enhanced Raman scattering (SERS) substrates were fabricated by the in-situ growth of silver nanoparticles (AgNPs) on polydopamine (PDA) templated filter papers (FPs), based on mussel-inspired surface chemistry. The obtained FP@PDA@AgNPs strips exhibited high sensitivity and reproducibility with Rhodamine 6G (R6G) probe molecules, with a calculated detection limit of approximately 10−10 M. More critically, these FP@PDA@AgNPs strips could be used as outstanding flexible SERS sensors to quickly collect and detect malachite green (MG) residues on fish scales, crab shells and shrimp skins by a swabbing extraction method. The detection limits for MG residues were calculated to be approximately as low as 0.04635 pg/cm2, 0.06952 pg/cm2 and 0.09270 pg/cm2, respectively. This facile and efficient strategy could to be utilized as a universal approach to fabricating a variety of flexible, cheap and portable SERS sensors for surface contamination analysis, and has great potential in the environmental scientific analysis and food safety monitoring fields.

Sign in / Sign up

Export Citation Format

Share Document