Ultrasonic‐Assisted Synthesis of Highly Defined Silver Nanodimers by Self‐Assembly for Improved Surface‐Enhanced Raman Spectroscopy

Zhang, Junfang; Gim, Soeun; Paris, Grigori; Dallabernardina, Pietro; Schmitt, Clemens N. Z.; Eickelmann, Stephan; Loeffler, Felix F.

doi:10.1002/chem.201904518

Cited by 5 publications

(5 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the LSPR excitation frequency, the extinction (absorption + scattering) cross-section,l ocal electric and magnetic field are dramatically enhanced. [1][2][3] As a result, the LSPR has been exploited in diverse applications including surface-enhanced Raman scattering (SERS), [4,5] metalenhanced fluorescence, [6,7] two-photon absorption, [8,9] photocatalytic water splitting, [10,11] dark-field imaging, [12,13] as well as photothermalt herapy. [14,15] Being the most common plasmonic material,m etals such as aluminium (Al), silver (Ag), gold (Au), and copper( Cu) possess high carrierd ensity (10 22 -10 23 cm À3 )a nd exhibit apparent LSPR over aw ider ange of spectralw avelengths from the ultraviolet (UV), to the visible (Vis) and near infrared (NIR) regions.…”

Section: Introductionmentioning

confidence: 99%

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu_2−xS Nanoparticles

Chen

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

For plasmonic copper‐deficient Cu2−xS nanoparticles (NPs), accurate control of the crystal phase and morphology is highly desirable as both of which are known to determine the localized surface plasmon resonance (LSPR) wavelength and amplitude. Here, how the sulfur precursor reactivity in the synthesis of Cu2−xS NPs affects the resulting crystal phase and morphology is examined. Djurleite Cu1.94S, roxbyite Cu1.8S, digenite Cu1.8S as well as covellite CuS nanodisks were synthesized by using 1‐dodecanethiol, N,N‐dibutylthiourea, and crystal sulfur 1‐octadecene/oleylamine solutions and their crystal phase dependent LSPR properties were exhaustively discussed. In addition, crystal phase interconversion between covellite CuS and djurleite/roxbyite Cu2−xS was realized in the presence of the above sulfur precursors. On the other hand, djurleite Cu1.94S nanorods rather than nanodisks were prepared by replacing 1‐dodecanethiol with more reactive tert‐dodecanethiol. The structural and morphological Cu2−xS NPs here holds great promise in the application of photothermal therapy, photocatalysis, surface‐enhanced Raman scattering (SERS), and many others.

show abstract

Section: Introductionmentioning

confidence: 99%

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu_2−xS Nanoparticles

Chen

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…Raman signal enhancement mechanisms based on EM enhancement employ plasmonic noble metals as SERS substrates [ 173 , 174 ]. Semiconductor materials -either organic or inorganic- possess inherent Raman signals enhancement by charge-transfer mechanisms, paving a new way for SERS based on CM [ 175 ].…”

Section: Direct Sers Detection Of Cancer and Pathogensmentioning

confidence: 99%

Nanomaterials meet surface-enhanced Raman scattering towards enhanced clinical diagnosis: a review

2022

View full text Add to dashboard Cite

Surface-enhanced Raman scattering (SERS) is a very promising tool for the direct detection of biomarkers for the diagnosis of i.e., cancer and pathogens. Yet, current SERS strategies are hampered by non-specific interactions with co-existing substances in the biological matrices and the difficulties of obtaining molecular fingerprint information from the complex vibrational spectrum. Raman signal enhancement is necessary, along with convenient surface modification and machine-based learning to address the former issues. This review aims to describe recent advances and prospects in SERS-based approaches for cancer and pathogens diagnosis. First, direct SERS strategies for key biomarker sensing, including the use of substrates such as plasmonic, semiconductor structures, and 3D order nanostructures for signal enhancement will be discussed. Secondly, we will illustrate recent advances for indirect diagnosis using active nanomaterials, Raman reporters, and specific capture elements as SERS tags. Thirdly, critical challenges for translating the potential of the SERS sensing techniques into clinical applications via machine learning and portable instrumentation will be described. The unique nature and integrated sensing capabilities of SERS provide great promise for early cancer diagnosis or fast pathogens detection, reducing sanitary costs but most importantly allowing disease prevention and decreasing mortality rates.

show abstract

“…It is well known that Au and Ag are widely used as SERS substrates due to their wonderful SERS effect, and their local surface plasma resonance (LSPR) enhances the electromagnetic field near the surface, resulting in a greatly enhanced Raman scattering signal of the adsorbed molecules. 5 Unfortunately, it is difficult to separate and recycle Au (Ag) from the solution and recycle it. The combination of magnetic materials and precious metals Au and Ag, due to their good magnetic properties, can not only achieve rapid separation and easy recycling but also achieve high detection sensitivity.…”

Section: Introductionmentioning

confidence: 99%

“…Due to its speed, accuracy, and sensitivity, surface-enhanced Raman scattering (SERS), a non-destructive analytical technique, has been widely employed in materials science, environmental assessment, food safety, and biomedicine. − However, the application of SERS is mainly based on the enhanced Raman signal generated by the SERS active substrate. It is well known that Au and Ag are widely used as SERS substrates due to their wonderful SERS effect, and their local surface plasma resonance (LSPR) enhances the electromagnetic field near the surface, resulting in a greatly enhanced Raman scattering signal of the adsorbed molecules . Unfortunately, it is difficult to separate and recycle Au (Ag) from the solution and recycle it.…”

Section: Introductionmentioning

confidence: 99%

Composites of ZIF-67 MOF Nanostructures and CoFe₂O₄ Magnetic Nanospheres Both Decorated with Ag Nanoparticles as SERS Carboxylesterase 1 Sandwich Assay Immunosensors

Cheng

Chen

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

In this work, we have fabricated a surface-enhanced Raman scattering (SERS) magnetic immunosensor using a sandwich structure consisting of an SERS tag, a supporting substrate with magnetic properties, and a target. On the one hand, the SERS tag consists of AgNPs, a metal−organic framework called the zeolite imidazolate framework-67 (ZIF-67), and R6G, which acts as a Raman reporter. Due to the self-selective SERS-enhancing properties of ZIF-67 and better adsorption to analytes, SERS tags with this structure can further enhance the sensing capabilities. On the other hand, after surface functionalization with the human carboxylesterase 1 (hCE1) antibody, the nanostructure containing CoFe 2 O 4 as the magnetic core and Ag NPs as the shell was used as the magnetic support substrate. The introduction of the CoFe 2 O 4 magnetic core can not only realize the rapid separation of biological samples to simplify pre-treatment procedures but also stabilize and uniformly distribute the AgNPs and increase the Raman "hot spots", thereby further enhancing the SERS intensity and improving the reproducibility. Not only that, the SERS signal can be further enhanced by the synergistic effect generated by the plasmonic coupling of the CoFe 2 O 4 magnetic core−Ag satellite nanostructure (CoFe 2 O 4 /Ag). hCE1 in HepG-2 cell lysates and culture supernatants was rapidly determined using the constructed SERS magnetic immunosensor, and hCE1 released from acetaminophen-treated HepG-2 cells into the extracellular medium was also monitored in real time. The limit of detection was as low as 3.6 pg/mL, and the linear response covered a range of hCE1 concentrations (1.0 ng/mL−1.0 mg/mL) spanning 3 orders of magnitude. This strategy can be used for the quantitative detection of complex trace proteins or enzymes in biological samples. KEYWORDS: surface-enhanced Raman scattering (SERS), ZIF-67/AgNP, CoFe 2 O 4 /Ag, synergistic effect, magnetic immunosensor, human carboxylesterase 1 (hCE1)

show abstract

Ultrasonic‐Assisted Synthesis of Highly Defined Silver Nanodimers by Self‐Assembly for Improved Surface‐Enhanced Raman Spectroscopy

Abstract: Supporting information and the ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.org/10.

Cited by 5 publications

References 41 publications

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu_2−xS Nanoparticles

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu_2−xS Nanoparticles

Nanomaterials meet surface-enhanced Raman scattering towards enhanced clinical diagnosis: a review

Composites of ZIF-67 MOF Nanostructures and CoFe₂O₄ Magnetic Nanospheres Both Decorated with Ag Nanoparticles as SERS Carboxylesterase 1 Sandwich Assay Immunosensors

Contact Info

Product

Resources

About

Ultrasonic‐Assisted Synthesis of Highly Defined Silver Nanodimers by Self‐Assembly for Improved Surface‐Enhanced Raman Spectroscopy

Abstract: Supporting information and the ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.org/10.

Cited by 5 publications

References 41 publications

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu2−xS Nanoparticles

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu2−xS Nanoparticles

Nanomaterials meet surface-enhanced Raman scattering towards enhanced clinical diagnosis: a review

Composites of ZIF-67 MOF Nanostructures and CoFe2O4 Magnetic Nanospheres Both Decorated with Ag Nanoparticles as SERS Carboxylesterase 1 Sandwich Assay Immunosensors

Contact Info

Product

Resources

About

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu_2−xS Nanoparticles

Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu_2−xS Nanoparticles

Composites of ZIF-67 MOF Nanostructures and CoFe₂O₄ Magnetic Nanospheres Both Decorated with Ag Nanoparticles as SERS Carboxylesterase 1 Sandwich Assay Immunosensors