Multi-walled carbon nanotubes/nickel hydroxide composite applied as electrochemical sensor for folic acid (vitamin B9) in food samples

Winiarski, João Paulo; Rampanelli, Ricardo; Bassani, Jean Carlos; Mezalira, Daniela Zambelli; Jost, Cristiane Luisa

doi:10.1016/j.jfca.2020.103511

Cited by 47 publications

(14 citation statements)

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“…Nowadays, numerous works are devoted to both the synthesis and electrochemical and electrocatalytic properties’ investigation of carbon‐matrix nanostructured composites (NSCs) filled with transition metal oxides and hydroxides (see for instance other studies). [ 1–8 ] These systems attract a lot of attention largely due to the shown promise of creating composite electrode materials for supercapacitors (SCs) with high functional characteristics. [ 9–19 ] Majority of works focuses on the composites obtained from highly porous carbon matrices with highly developed mesoporosity and specific surface area.…”

Section: Introductionmentioning

confidence: 99%

Multiwalled Carbon Nanotubes: Matrix Nanostructured Composites as Electrode Materials for Supercapacitors

et al. 2021

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Herein, nanostructured composites (NSCs) based on multiwalled carbon nanotubes (MWCNTs) filled with the individual (IH) and mixed (MH) Ni/Co hydroxides nanoparticles are prepared and an influence of NSC morphology and texture on their electrical capacitance is considered. It is found that MWCNTs have a channel diameter (2−5 nm), external diameter (18−23 nm), and wall width (2−12 nm). In NSCs obtained by precipitation of hydroxides from chloride aqueous solutions in an alkaline medium, the filler particles are formed as nanocrystallites inside the channels as well as aggregates composed of crystallites (up to 10 nm in size) situated on the external MWCNT surface. These aggregates look like islands, 15−16 nm wide, and are at least 200 nm long. Functionalization via ozonation causes nontrivial effects of an increase in the size and anisometry of the MH crystallites. The dependence of the NSC electrical capacitance on the content of fillers appears to be extreme. The content in the range of 5−10 wt% which allows increasing the capacitance by 1.2 and 1.5 times as compared with that for MWCNTs is optimal for scanning rates of 80 and 10 mV s−1, respectively.

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Section: Introductionmentioning

confidence: 99%

Multiwalled Carbon Nanotubes: Matrix Nanostructured Composites as Electrode Materials for Supercapacitors

et al. 2021

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“…FA is a water-soluble vitamin essential for cellular division and prenatal development [ 31 , 32 , 33 ]. It can bind to folate receptors (FRs) with a high affinity and then enter the cell by FR-mediated endocytosis [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Cytosensor Based on a Gold Nanostar-Decorated Graphene Oxide Platform for Gastric Cancer Cell Detection

Zhang

Liu

Huang

et al. 2022

Sensors

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Effectively capturing and sensitively detecting cancer cells are critical to clinical diagnosis and cancer therapy. In this work, we prepared gold nanostar-decorated graphene oxide (GO-AuNSs) nanocomposites using a ultraviolet (UV)-induced strategy, and then modified them with a layer of bio-complex rBSA-FA (coupled reduced bovine serum albumin with folic acid) to generate GO-AuNSs@rBSA-FA nanocomposites. Herein, the application of GO and AuNSs not only strengthened the conductivity of the sensing platform but also guaranteed nanocomposites with biocompatible performance. Moreover, the adopted rBSA-FA layer could effectively enhance the stability and specificity towards gastric cancer cells (MGC-803). According to a systemic construction procedure, a novel electrochemical cytosensor based on GO-AuNSs@rBSA-FA was fabricated for MGC-803 cell detection. With the assistance of cyclic voltammetry (CV) and differential pulse voltammetry (DPV), the cytosensor reached a detection limit of 100 cell/mL in a wide linear range of 3 × 102~7 × 106 cell/mL towards MGC-803 cells. The good electrochemical characteristics for the cancer cell analysis indicate a promising prospect of this electrochemical cytosensor in clinical cancer diagnosis.

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“…With several modifications to achieve selectivity and sensitivity, CNTs have been used to determine different vitamins. For example, a MWCNT/nickel hydroxide composite detected vitamin B9 with LOD values of 0.095 μmol L –1 . A carbon nanotube paste including p -aminophenol can detect vitamin C in the molar range (8.0 × 10 –8 M) .…”

Section: Introductionmentioning

confidence: 99%

High-Performance, Nitrogen-Doped, Carbon-Nanotube-Based Electrochemical Sensor For Vitamin D3 Detection

Bora

Mandal

Chandra

2022

ACS Appl. Bio Mater.

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With the fast changing lifestyle, vitamin D deficiency is becoming extremely common. Therefore, development of economical, efficient, and fast sensors for vitamin D is the need of the hour. Carbon-based nanomaterials are extensively explored in sensing of variety of biomolecules. In the present study, an antibody-free, highly sensitive, carbon-nanotube-based, highly responsive vitamin D3 sensor is reported. Nitrogen-doped carbon nanotubes are utilized to overcome the limiting factor of hydrophobic character of pure carbon. The synthesized N-doped CNTs showed a specific surface area of 24 m 2 /g. The surface charges of vitamin D3 and the vitamin D3/NCNT complex are found to be −20 and −6.4 mV, respectively, by zeta potential measurements. The sensor is able to deliver high performance in the concentration range of 0−10 nM, with a limit of detection of 16 pM. The response study indicated the sensitivity value as 0.000495 mA/cm 2 nM. The sensor is also able to show a higher selectivity toward vitamin D3 in comparison to other biomolecules. The long-term stability, reproducibility, good linear range, and ultralow detection capability of the sensor are also reported.

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Multi-walled carbon nanotubes/nickel hydroxide composite applied as electrochemical sensor for folic acid (vitamin B9) in food samples

Cited by 47 publications

References 50 publications

Multiwalled Carbon Nanotubes: Matrix Nanostructured Composites as Electrode Materials for Supercapacitors

Multiwalled Carbon Nanotubes: Matrix Nanostructured Composites as Electrode Materials for Supercapacitors

Electrochemical Cytosensor Based on a Gold Nanostar-Decorated Graphene Oxide Platform for Gastric Cancer Cell Detection

High-Performance, Nitrogen-Doped, Carbon-Nanotube-Based Electrochemical Sensor For Vitamin D3 Detection

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