scholarly journals Morphology-Controlled Versatile One-Pot Synthesis of Hydrophobic Gold Nanodots, Nanobars, Nanorods, and Nanowires and Their Applications in Surface-Enhanced Raman Spectroscopy

2019 ◽  
Vol 9 (5) ◽  
pp. 935 ◽  
Author(s):  
Jing Neng ◽  
Chen Xiang ◽  
Kan Jia ◽  
Xiaohua Nie ◽  
Peilong Sun
Keyword(s):  
Reaction Times ◽  
Surface Enhanced Raman Spectroscopy ◽  
Chloroauric Acid ◽  
One Pot ◽  
Sers Substrates ◽  
One Pot Synthesis ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Potential Applications ◽  
Gold Nanomaterials

Many previously reported syntheses of gold nanoparticles required lengthy reaction times, complicated operations, high temperatures, or multi-step manipulations. In this work, a morphology-controlled versatile one-pot synthesis of hydrophobic gold nanodots, nanobars, nanorods, and nanowires has been developed. A series of gold nanomaterials ranging from round nanodots, short nanobars, and long nanorods to ultrathin and ultralong nanowires (diameter <2 nm, length >2 μm) have been readily prepared by simply adjusting the feeding ratio of chloroauric acid to oleylamine, oleic acid, and triphenylsilane. The silk-like ultralong and ultrathin nanowires were found to have a single crystalline structure and may have significant potential applications in microelectronics and biosensors. Large sizes of gold spherical nanoparticles were obtained from gold nanodots via a seed-mediated growth approach. These nanoparticles and ultralong nanowires showed excellent surface-enhanced Raman scattering (SERS) activity in organic solvents and, therefore, were employed as efficient organic-soluble SERS substrates for the detection of hydrophobic food toxicants, such as 3,4-benzopyrene, and carcinogens, such as benzidine.

One-pot synthesis of silver colloid with body-heat for surface-enhanced Raman spectroscopy detections

2019 ◽  
Vol 30 (5) ◽  
pp. 1027-1030
Author(s):  
Wanchao Chen ◽  
Yan Kang ◽  
Han Zhang ◽  
Tianxiong Huang ◽  
Xin Tao ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silver Colloid ◽  
One Pot ◽  
One Pot Synthesis ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Body Heat

scholarly journals SERS on Bimetallic Nanostructured thin films

2021 ◽  
Author(s):  
revathy m s ◽  
D Murugesan ◽  
Naidu Dhanpal Jayram
Keyword(s):  
Thin Films ◽  
Thermal Evaporation ◽  
Low Cost ◽  
Active Surface ◽  
Surface Enhanced Raman Spectroscopy ◽  
Nanostructured Film ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
The Cost

Abstract Thin films and Surface Enhanced Raman spectroscopy have a strong bonding towards development of Sensors. From last 4 decades SERS has been used as effective tool for detection of toxic dyes, in food industry and agriculture world. To minimize the cost and fabrication over large surface is the most challenging task in substrate fabrication. In the present work an attempt has been made towards dual coatings, which could act as an effective SERS Substrates. An effective and facile approach of low cost bi-metallic Nanostructured film has been fabricated using thermal evaporation. Using the standard characterization techniques such as FE-SEM and XRD, the obtained films were Rhodamine 6G was used as an analyte for the SERS studies. The detection of R6G was up to 10− 10mol l− 1solution.The present bi-metallic coating can be serves as an excellent SERS active surface and provides a versatile pathway to fabricate anisotropic nanostructure on a glass film.

Surface Modification of Gold Nanostars Through the Changes on Gold Seed Concentrations

MRS Advances ◽  
2018 ◽  
Vol 3 (41) ◽  
pp. 2449-2454
Author(s):  
Juan Carlos Martinez Espinosa ◽  
Miguel Jose Yacaman ◽  
German Plascencia Villa ◽  
Victor Hugo Romero Arellano ◽  
Ana Karen Zavala Raya
Keyword(s):  
Biomedical Applications ◽  
Surface Enhanced Raman Spectroscopy ◽  
Diameter Distribution ◽  
Biological Assays ◽  
Surface Enhanced ◽  
Different Types ◽  
Surface Enhanced Raman ◽  
Gold Seed ◽  
Gold Nanomaterials ◽  
Specific Membrane

AbstractDue to its excellent optical properties, gold nanomaterials with anisotropic morphology are playing an important role in biomedical applications, specifically in the use of Surface Enhanced Raman Spectroscopy (SERS) technique for biological assays. In this work, we verified the behavior of the star shape nanoparticle peaks obtained by chemical synthesis (precursor reactant: HAuCl4, cationic surfactant: CTAB) and whose peaks were formed from the different concentrations of gold seeds (55, 65, 75 and 85 ul) which were added to the total solution (5.275 ml). The shape and size of the nanoparticles was verified with a Hitachi S-5500 microscope with a BF & DF SEM / STEM detector, and for the diameter distribution (hydrodynamic) was carried out by the dynamic light distribution technique with a Malvern DLS system Zetasizer Nano ZS. Particle sizes (peak-to-peak considering) were obtained with variations from 107 to 166 nm. The results suggest adding 75 ul of gold seeds to obtain uniform nanostars with well defined peaks. These gold nano-stars could be applied for identification of specific membrane markers for the study of different types of cancer by the SERS technique.

Identification and Characterization of Artists' Red Dyes and Their Mixtures by Surface-Enhanced Raman Spectroscopy

2007 ◽  
Vol 61 (9) ◽  
pp. 994-1000 ◽  
Author(s):  
Alyson V. Whitney ◽  
Francesca Casadio ◽  
Richard P. Van Duyne
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Localized Surface Plasmon ◽  
Carminic Acid ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Lac Dye ◽  
Silver Island

Silver film over nanospheres (AgFONs) were successfully employed as surface-enhanced Raman spectroscopy (SERS) substrates to characterize several artists' red dyes including: alizarin, purpurin, carminic acid, cochineal, and lac dye. Spectra were collected on sample volumes (1 × 10−6 M or 15 ng/μL) similar to those that would be found in a museum setting and were found to be higher in resolution and consistency than those collected on silver island films (AgIFs). In fact, to the best of the authors' knowledge, this work presents the highest resolution spectrum of the artists' material cochineal to date. In order to determine an optimized SERS system for dye identification, experiments were conducted in which laser excitation wavelengths were matched with correlating AgFON localized surface plasmon resonance (LSPR) maxima. Enhancements of approximately two orders of magnitude were seen when resonance SERS conditions were met in comparison to non-resonance SERS conditions. Finally, because most samples collected in a museum contain multiple dyestuffs, AgFONs were employed to simultaneously identify individual dyes within several dye mixtures. These results indicate that AgFONs have great potential to be used to identify not only real artwork samples containing a single dye but also samples containing dyes mixtures.

scholarly journals Surface-Enhanced Raman Scattering as an Emerging Characterization and Detection Technique

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Mustafa Culha ◽  
Brian Cullum ◽  
Nickolay Lavrik ◽  
Charles K. Klutse
Keyword(s):  
Raman Spectroscopy ◽  
Molecular Biology ◽  
Rapid Growth ◽  
Scientific Community ◽  
Surface Enhanced Raman Spectroscopy ◽  
Biological Applications ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

While surface-enhanced Raman spectroscopy (SERS) has been attracting a continuously increasing interest of scientific community since its discovery, it has enjoyed a particularly rapid growth in the last decade. Most notable recent advances in SERS include novel technological approaches to SERS substrates and innovative applications of SERS in medicine and molecular biology. While a number of excellent reviews devoted to SERS appeared in the literature over the last two decades, we will focus this paper more specifically on several promising trends that have been highlighted less frequently. In particular, we will briefly overview strategies in designing and fabricating SERS substrates using deterministic patterning and then cover most recent biological applications of SERS.

Nanoimprinted SERS Sensors for Chemical and Biological Detection

MRS Advances ◽  
2017 ◽  
Vol 2 (19-20) ◽  
pp. 1077-1082 ◽  
Author(s):  
Guinevere Strack ◽  
Michaela Fitzgerald ◽  
Junwei Su ◽  
Margery G. H. Pelletier ◽  
Peter Gaines ◽  
...  
Keyword(s):  
Rhodamine 6G ◽  
Low Cost ◽  
Polymer Surface ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silicon Substrates ◽  
E Coli ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Synthesis Procedure

ABSTRACTHerein, we demonstrate a facile, rapid, and scalable method to fabricate polymer-based gratings for surface-enhanced Raman spectroscopy (SERS) sensors. To accomplish this, epoxy nanostripe arrays on silicon substrates were prepared using thermal annealing and UV-cross-linking. After preparation of the nanostripe arrays, the surface was briefly treated with oxygen plasma, which decreased the surface energy and enabled the growth of AgNPs on the polymer surface using a simple, low-cost, aqueous-based synthesis procedure. The SERS substrates exhibited a detection limit of ∼1 pM using rhodamine 6G (R6G). In addition, preliminary work with E. coli DH5 showed that the nanoimprinted substrates can be used to obtain Raman spectra of washed bacteria cells.

One-pot in situ photochemical synthesis of graphene oxide/gold nanorod nanocomposites for surface-enhanced Raman spectroscopy

RSC Advances ◽  
2015 ◽  
Vol 5 (58) ◽  
pp. 46552-46557 ◽  
Author(s):  
A. J. Caires ◽  
D. C. B. Alves ◽  
C. Fantini ◽  
A. S. Ferlauto ◽  
L. O. Ladeira
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Gold Nanorods ◽  
Surface Enhanced Raman Spectroscopy ◽  
Photochemical Synthesis ◽  
One Pot ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

One-pot process is demonstrated that produces gold nanorods/graphene oxide nanocomposites that can be used as highly sensitive surface-enhanced Raman spectroscopy substrates.

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