Abstract The preparation of highly sensitive and low cost substrate remains challenging in surface‐enhanced Raman spectroscopy (SERS). Here, a simple silver nanoparticle‐modified thin polydimethylsiloxane (PDMS) sheet was prepared as SERS via silicon‐assisted interfacial self‐assembly transfer Langmuir–Schaefer deposition technique. influence the surface coverage on PDMS investigated optimized to achieve maximal signal enhancement. Through test rhodamine 6G 4‐mercaptobenzoic acid probe,...

Nowadays, due to advantages of maneuverability, portability and low cost, the mini quadrotor unmanned aerial vehicle (UAV) catches much attention. In some special applications such as narrow space search, stealth detection cooperative in huge region, UAV is more suitable than a big one. However, light weight size lead phenomenon that it hard for use complex control method. Besides, performance wind resistant significant practicability. this paper, under-actuated dynamics, strong nonlinear...

Wine has always been a popular carrier for psychedelic drugs, with the rapid identification and quantification of drugs in wine being focus regulating illegal behavior. In this study, surface-enhanced Raman spectroscopy (SERS) is used detection Flibanserin liquor, beer grape wine. First, theoretical spectrum characteristic peaks was calculated identified, limit 1 μg mL-1 liquor determined. The curve equation obtained by fitting using least squares method, correlation coefficient 0.995....

<italic>In situ</italic> analysis of pesticide residues on the surface agricultural products <italic>via</italic> surface-enhanced Raman spectroscopy using a flexible Au@Ag–PDMS substrate.

Current label-free surface-enhanced Raman spectroscopy (SERS) assay for the detection and analysis of organophosphorus pesticides has achieved initial success, but application still faces constraints substrate portability specificity. To this end, paper demonstrates a method portable, rapid, specific low concentrations fenthion based on solid gold nanoparticle monolayers combined with molecularly imprinted polymers (MIPs). The nano-monolayers were transferred to surface mercapto-silicon...

In this study, surface‐enhanced Raman spectroscopy ( SERS ) technology was used to rapidly detect illegally added sildenafil drugs. A detailed attribution analysis by density functional theory DFT guide specific experiments. The signals were obtained from a silver colloid (Ag col) substrate, and they increased in the presence of mineral salt, potassium iodide KI ). These methods detected aqueous solutions as low 1 µg/ mL with high signal uniformity RSD =3.77%). Prior traditional techniques...

In this paper, a non-invasive, simple and efficient approach is constructed to make clean gold nanostar substrates with higher enhancement effect, homogeneous surface-enhanced Raman scattering (SERS) activity high reproducibility, which are the assembly of nanostars based on electrostatically assisted APTES-functionalized surface-assembly method. The obtained enable us successfully compare distinguish two lung cancer cell lines [human adenocarcinoma epithelial line (A549), human non-small...

Abstract Erythrina corallodendron L., a kind of landscape tree, has long been used as traditional medicine. In this study, the composition essential oil extracted from leaves was analysed by GC-MS (gas chromatograph-mass spectrometer), with linalool identified main compound. Its cytotoxicity against MDA-MB-231, MCF-7 and HMLE cells examined MTT cloning assays. Transwell wound-healing assays were to examine inhibition migration invasion. Western blot, qRT-PCR immunofluorescence staining...

Estazolam (EST) is a common sedative-hypnotic drug with risk of abuse. Therefore, rapid on-site detection EST necessary to control the abuse EST. In this paper, fast, simple, and sensitive method demonstrated for in both water beverages, using surface-enhanced Raman spectroscopy (SERS) techniques. Au@Ag core-shell nanoparticles (NPs) assembled on filter paper as SERS substrate exhibit good applicability practicality. At same time, density functional theory (DFT) used assign vibration mode...

Abstract Novel Janus-type guanosine–cytosine pyrimido[4,5-d]pyrimidine and its 2′-deoxyribonucleoside have been synthesized in a viable route employing the Vorbruggen method.

Abstract This paper reports a “bottom‐up” substrate preparation method using two‐phase interface self‐assembly technology that combines silver‐coated gold core–shell nanorods with the thermally shrinkable polystyrene (TSP) support material for surface‐enhanced Raman spectroscopy (SERS), is, TSP‐SERS substrate. The long absorption wavelength were used as core, and silver shells coated to obtain nanostructures stronger resonance of light source. density numbers “hot spots” within spot...

Surface-enhanced Raman spectroscopy (SERS) has gradually proved to be a powerful tool with wide applications in various fields. Here, simple and rapid SERS method was developed for the determination of ketamine urine based on silver aggregates as substrate. Ketamine were demonstrated by technique sol aggregated 0.5 M NaBr solution. The limit detection could obtained low 7.5 ppm, linear relationship between intensity concentrations achieved range from 150 ppm (R2 = 0.977). Additionally,...

Abstract A novel chemiluminescence (CL) flow injection method for the determination of pazufloxacin mesylate (PZFX) is described. It based on CL a KMnO4–Na2S2O4 system sensitized by complex [Eu(PZFX)2]3+, and shows intensive characteristic bands Eu3+. The optimum conditions emission were investigated. Under experimental condition, linear range 1.0×10−8–1.0×10−6 mol/L detection limit 2.6×10−9 mol/L. was successfully applied to PZFX in serum urine samples. possible mechanism this discussed.

Surface-enhanced Raman spectroscopy (SERS) was used to measure scopolamine hydrobromide. First, the characteristic peaks of hydrobromide were assigned, and determined. The optimal aggregation agent potassium iodide based on a comparative experimental study. Finally, SERS spectrum detected in aqueous solution, semi-quantitative analysis recovery rate determined via linear fitting. detection limit solution 0.5 μg/mL. From 0 - 10 μg/mL, curve intensity peak at 1002 cm-1 is y = 4017.76 +...

In this investigation, surface-enhanced Raman spectroscopy (SERS) technology was performed to detect bucinnazine hydrochloride (BH) injection in water and urine. The theoretical spectrum of BH with characteristic peaks calculated identified by density functional theory (DFT). Employing an improved silver sol as a SERS active substrate, the spectra solution different concentrations were acquired 0.5 mol/L KI aggregation agent. It determined that limit detection (LOD) low, 0.01 μg/mL. A good...

Promethazine and scopolamine are two major components of a drug commonly used as substitute for heroin addiction but with its own potential abuse. Here, surface-enhanced Raman spectroscopy experiments were combined density functional theory computations the frequencies promethazine. The enhancement SERS substrate was optimized by contrast detection silver nanoparticles. to detect scopolamine, promethazine their mixtures. Several mixtures different concentrations detected analyzed. approach...

Abstract Trace elemental sulfur, S0, in naphtha and gasoline seriously affects the quality of gasoline. It is difficult to analyze contents trace sulfur because their low concentrations. Presently, S0 are usually determined by polarography, but practical use this method limited some interference factors. In work, structure was studied through many experiments gas chromatography/mass spectrometry (GC/MS) mainly present as S8. A new analytical for determination using GC/MS developed. The...

In this paper, we report a novel antibody conjugated gold nanostars ( AuNSs ) as surface-enhanced Raman spectroscopy (SERS) probes for distinguishing cancer cells (A549 cells, H1229 cells) from normal (ATII cells). such probe, bovine serum albumin (BSA) was served the protective agent and stabilizing agent, 4-mercaptobenzoic acid (4-MBA) used reporter to generate SERS signals well conjugation attaching CD44 (anti-CD44) molecules , where anti-CD44 could effectively target protein...

Abstract Optical coherence tomography (OCT) is a reliable technique for cancer detection, with the potential to improve accuracy in identifying cancerous tissue through effective use of OCT image data. We proposed an optimized depth resolution estimation based optical attenuation coefficient (OAC) mapping method reduce error effect caused by discretization without considering whether light completely attenuated or not. The maps gastric were reconstructed using this method. Features extracted...