Flexible and reusable cap-like thin Fe2O3 film for SERS applications

Xu, Jiangtao; Li, Xiaoting; Wang, Yuxiang; Guo, Ronghui; Shang, Songmin

doi:10.1007/s12274-018-2227-1

Cited by 42 publications

(25 citation statements)

References 53 publications

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“…( 1 where I sers denotes the SERS intensity of the MB molecules based on the prepared substrates; I 0 refers to the intensity of the MB molecules based on the untreated cotton fabric; N sers denotes the number of MB molecules absorbed on the surface of the SERS substrates, and N 0 represents the number of MB molecules with a certain volume that are laser excited. The details of the calculation process can be found in our previous reports (Xu, Li, et al, 2019;Xu et al, 2020;. It is worth noting that the peak located at 1624 cm − 1 is detected in both the spectra obtained under laser excitation of different wavelengths, thus, the intensity of this peak is selected to calculate the EFs, which are then plotted and the curves are shown in Fig.…”

Section: Evaluation and Investigation Of Sers Performancementioning

confidence: 99%

“…Consequently, semiconductor SERS substrates, such as titanium dioxide (TiO 2 ) (Ling et al, 2010), iron III oxide (Fe 2 O 3 ) (Xu, Li, et al, 2019), copper telluride (CuTe) (W. Li et al, 2013) and copper I oxide (Cu 2 O) (Lin et al, 2018) substrates, have been developed. Interestingly, these partial semiconductors present an outstanding LOD of 10 − 7 M, high enhancement factor (EF) of 10 5 (Zheng et al, 2017), and excellent chemical and signal stability.…”

Section: Introductionmentioning

confidence: 99%

“…For the applications including the examination of food safety (Ogundare & van Zyl, 2019), the prediction of disease (Kwon et al, 2019), the detection of the presence of bacteria and the monitor of the environment (Xu, Li, et al, 2019), SERS substrates are required to be easy-to-use, light in weight, small in size and have the ability to e ciently collect the target molecules. Thus, the portability or exibility of SERS substrates matters.…”

Section: Introductionmentioning

confidence: 99%

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Ag@ZIF-67 decorated cotton fabric as flexible, stable and sensitive SERS substrate for label-free detection of phenol-soluble modulin

Shang

Gao

et al. 2021

Cellulose

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Although strategies of compositing noble materials and Zeolitic imidazolate frameworks (ZIFs) have been used to enhance the performance of ZIF-based surface-enhanced Raman scattering (SERS) substrates, the enhancement process still remains unclear and the sampling process with powder-form substrates is challenging for practical applications. In this study, a exible SERS substrate with silver (Ag) nanoparticle decorated ZIF-67 as the active materials and cotton fabric as the supporting framework is developed with a facile method in two steps. The proposed exible SERS substrate not only can reduce di culties during the sampling process, but also expands future applications for sampling towards irregular target substances. Meanwhile, the enhancement mechanism has been investigated by using Methylene Blue (MB) to probe the molecular interactions. The constructed SERS substrate shows the highest enhancement factor of 6.25×10 6 and an excellent detection sensitivity with a limitation of detection (LoD) of 10 − 14 M/L. Because of its excellent performance in SERS tracing, the proposed SERS substrate shows exceptional ability in detecting and identifying phenol-soluble modulins and is considered to be a label-free approach that requires no adding markers/tags or antibodies. The proposed substrate expands the potential applications of SERS technology for rapid detection of bacterial toxins during clinical diagnoses and treatment.

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Section: Evaluation and Investigation Of Sers Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ag@ZIF-67 decorated cotton fabric as flexible, stable and sensitive SERS substrate for label-free detection of phenol-soluble modulin

Shang

Gao

et al. 2021

Cellulose

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“…Recently, flexible SERS substrates, such as sponge, adhesive tape, polydimethylsiloxane, quartz fabric, and papers, have attracted much attention, and much effort has been made to expand their range of applications. For example, PNPs synthesized on the sponge and used for the trace detection of thiram, malachite green, and adhesive tape were modified with PNPs to prepare simple and cost‐effective SERS substrates for detecting pesticide residues on vegetable and fruit surfaces, and paper‐based SERS substrates have been manufactured and used for the detection of bacteria and pathogens …”

Section: Introductionmentioning

confidence: 99%

Printer‐assisted array flexible surface‐enhanced Raman spectroscopy chip preparation for rapid and label‐free detection of bacteria

Yang

Chen

Danyang

et al. 2020

J Raman Spectroscopy

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A low‐cost array flexible surface‐enhanced Raman spectroscopy (SERS) chip was proposed with the aim of rapid detection of bacteria. The substrate of the chip was Al foil, and the detection area arrays were printed using a laser toner. Colloidal silver nanoparticles (AgNPs) were dropped onto the detection area, with the AgNPs droplets confined within the detection area by the hydrophobic properties of the toner film. The colloidal AgNPs were dried naturally to form a SERS active chip. An A4 paper‐based SERS chip was prepared using the same method for control experiments. The surface morphology of the chip was characterized by field emission scanning electron microscopy. In addition, comparison experiments were performed on the two SERS chips. The results showed that both SERS chips exhibited the best SERS enhancement when the AgNPs were added four times. The calculation of Rhodamine 6G at the 612 cm−1 peak showed that the EF of the A4 paper‐based chip and the Al foil‐based chip were 6.72 × 107 and 1.03 × 108, respectively. SERS mapping results showed that the Al foil‐based chip had much higher signal homogeneity than that of A4 paper‐based chip. Lastly, the Al foil‐based chip was used for bacterial detection. For Escherichia coli and Staphylococcus aureus, the limit of detection was 1,000 and 100 cfu/ml, and the relative standard deviation of 36 randomly selected detection points were 12.5% and 11.7%, respectively. The entire detection process was completed in a few minutes. The SERS chip has the advantages of low cost, simple manufacturing process, and short detection time; is capable of high throughput and multi‐parameter detection; and is expected to provide a rapid and effective detection method for bacteria.

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“…As two key indicators related to the costs of materials and practicality, the yield and volume production should be further improved. Recently, SERS substrates have achieved considerable progress in the low cost and readily produced; many works have been reported on fiber‐based SERS substrates, such as fabrics and textile fibers . However, it is still necessary to further develop a rapid, facile, and low‐cost high‐production‐volume preparation method for high sensitivity SERS substrates.…”

Section: Introductionmentioning

confidence: 99%

Flexible and smart fibers decorated with Ag nanoflowers for highly active surface‐enhanced Raman scattering detection

Tong

Bian

et al. 2019

J Raman Spectroscopy

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Surface‐enhanced Raman scattering (SERS) is a useful detection technique for molecule recognition. However, the relative difficulty in producing low‐cost highly active SERS substrates in large quantities hinders their practical implementation. Here, a fast and facile approach using a one‐step solution‐phase synthesis is proposed to directly achieve highly active fibrous SERS substrates by uniformly and densely growing silver nanoflowers on reduced graphene oxide fibers within several minutes. Attributed to the abundance of nanogaps throughout the silver nanoflower network, the fibrous substrate exhibits superior stability and high sensitivity in the SERS detection of Rhodamine 6G, with a detection limit of 10−12 M. Importantly, the proposed method is energy efficient and can work well at room temperature and manually stirring conditions based on naturally shed hair and plant fibers. Due to the advantages of high‐volume production, the processing cost is greatly reduced to approximately $0.008 for each substrate. This newly designed approach may greatly improve the practical application of SERS detection in environmental monitoring, medicine and food safety, especially in resource‐limited environments.

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Flexible and reusable cap-like thin Fe2O3 film for SERS applications

Cited by 42 publications

References 53 publications

Ag@ZIF-67 decorated cotton fabric as flexible, stable and sensitive SERS substrate for label-free detection of phenol-soluble modulin

Ag@ZIF-67 decorated cotton fabric as flexible, stable and sensitive SERS substrate for label-free detection of phenol-soluble modulin

Printer‐assisted array flexible surface‐enhanced Raman spectroscopy chip preparation for rapid and label‐free detection of bacteria

Flexible and smart fibers decorated with Ag nanoflowers for highly active surface‐enhanced Raman scattering detection

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