Facile sonochemical synthesis of perovskite-type SrTiO3 nanocubes with reduced graphene oxide nanocatalyst for an enhanced electrochemical detection of α-amino acid (tryptophan)

Govindasamy, Mani; Wang, Sea‐Fue; Pan, Wei; Subramanian, Bowya; Ramalingam, R. Jothi; Al‐Lohedan, Hamad A.

doi:10.1016/j.ultsonch.2019.04.004

Cited by 95 publications

(31 citation statements)

References 55 publications

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“…Figure 2 depicts the XRD patterns of the synthesized NH 2 rGO, and NH 2 rGO-PAMAM composite. The formation of the synthesized NH 2 rGO was confirmed by a broad diffraction peak at 2θ = 26.35 and a small hump at 2θ = 40.17°, which stand for the (002) and (100) crystal plane of NH 2 rGO [69][70][71][72] . After being composited with PAMAM, the amorphous nature of NH 2 rGO was restored and slightly shifted to the left.…”

Section: Resultsmentioning

confidence: 99%

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Omar

Fen

Abdullah

et al. 2020

Sci Rep

113

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In this work, sensitive detection of dengue virus type 2 E-proteins (DENV-2 E-proteins) was performed in the range of 0.08 pM to 0.5 pM. The successful DENV detection at very low concentration is a matter of concern for targeting the early detection after the onset of dengue symptoms. Here, we developed a SPR sensor based on self-assembled monolayer/reduced graphene oxide-polyamidoamine dendrimer (SAM/NH 2 rGO/PAMAM) thin film to detect DENV-2 E-proteins. Surface characterizations involving X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR) confirms the incorporation of NH 2 rGO-PAMAM nanoparticles in the prepared sensor films. The specificity, sensitivity, binding affinity, and selectivity of the SPR sensor were then evaluated. Results indicated that the variation of the sensing layer due to different spin speed, time incubation, and concentration provided a better interaction between the analyte and sensing layer. The linear dependence of the SPR sensor showed good linearity (R 2 = 0.92) with the lowest detection of 0.08 pM DENV-2 E-proteins. By using the Langmuir model, the equilibrium association constant was obtained at very high value of 6.6844 TM −1 (R 2 = 0.99). High selectivity of the SPR sensor towards DENV-2 E-proteins was achieved in the presence of other competitors. Dengue virus (DENV) is the most common arthropod-borne viral disease that poses a serious global problem. According to World Health Organization (WHO), the dengue virus is the leading cause of death of 22 000, annually. As of today, the need for hospitalization and medical treatment are constantly dense due to the fact that 390 million people in the world are still infected with DENV 1. Its four distinct serotypes (DENV-1. DENV-2, DENV-3, and DENV-4) are capable of causing a range of clinical symptoms ranging from mild fevers to the severe dengue haemorrhagic fever (DHF) and be potentially life-threatening 2-10. Despite its large burden to human health, no effective vaccine and antiviral therapy are available for the virus 11,12. Early treatment for DENV is only by maintaining the body fluid of the patient, as it is critical in fighting the severe symptoms of DENV 13,14. Hence, an early, rapid, and accurate diagnosis at the onset of infection is the demand of the day in the most epidemic settings. Present discoveries in dengue diagnostics that can help in the early diagnosis are targeting the host-virus itself. DENV consists of a single-stranded positive-sense RNA virus that encodes 10 different types of proteins. Seven of

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Section: Resultsmentioning

confidence: 99%

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Omar

Fen

Abdullah

et al. 2020

Sci Rep

113

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“…The inorganic perovskite-type oxides show special physicochemical characteristics in ferroelectricity (Pontes et al 2017;Rana et al 2020;Cao et al 2017), piezoelectricity (Perumal et al 2019;Vu et al 2015;Xie et al 2019), dielectric (Arshad et al 2020;Zhou et al 2019;Boudad et al 2019), ferromagnetism (Yakout et al 2019;Ravi and (Wang et al 2015a;Liu et al 2007;Dwivedi et al 2015), and multiferroic (Li et al 2019b;Zhang et al 2016b;Pedro-García et al 2019). They are interesting nanomaterials for broad applications in catalysis (Grabowska 2016;Yang and Guo 2018;Hwang et al 2019;Xu et al 2019a;Ramos-Sanchez et al 2020), fuel cells (Kaur and Singh 2019;Sunarso et al 2017;Jiang 2019), ferroelectric random access memory (Gao et al 2020;Chen et al 2016a;Wang et al 2019a), electrochemical sensing and actuators (Govindasamy et al 2019a;Deganello et al 2016;Atta et al 2019;Zhang and Yi 2018;Rosa Silva et al 2019), and supercapacitors (Song et al 2020;Salguero Salas et al 2019;Lang et al 2019;George et al 2018). Furthermore, these materials possess a significant advantage that is the simple cry...…”

Section: Inorganic Perovskite-type Oxidesmentioning

confidence: 99%

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

et al. 2020

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Supercapacitors are increasingly used for energy conversion and storage systems in sustainable nanotechnologies. Graphite is a conventional electrode utilized in Li-ion-based batteries, yet its specific capacitance of 372 mA h g −1 is not adequate for supercapacitor applications. Interest in supercapacitors is due to their high-energy capacity, storage for a shorter period and longer lifetime. This review compares the following materials used to fabricate supercapacitors: spinel ferrites, e.g., MFe 2 O 4 , MMoO 4 and MCo 2 O 4 where M denotes a transition metal ion; perovskite oxides; transition metals sulfides; carbon materials; and conducting polymers. The application window of perovskite can be controlled by cations in sublattice sites. Cations increase the specific capacitance because cations possess large orbital valence electrons which grow the oxygen vacancies. Electrodes made of transition metal sulfides, e.g., ZnCo 2 S 4 , display a high specific capacitance of 1269 F g −1 , which is four times higher than those of transition metals oxides, e.g., Zn-Co ferrite, of 296 F g −1. This is explained by the low charge-transfer resistance and the high ion diffusion rate of transition metals sulfides. Composites made of magnetic oxides or transition metal sulfides with conducting polymers or carbon materials have the highest capacitance activity and cyclic stability. This is attributed to oxygen and sulfur active sites which foster electrolyte penetration during cycling, and, in turn, create new active sites.

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“…Combining various nanoparticles (NPs) or nanocomposites, the electrochemical biomarker sensors, especially those ECL- and PEC-based sensors, have better performance in limits of detection (LoD) and a linear range. Some electrochemical studies also show that these composites have “excellent electrochemical properties such as a large electrochemically active surface, high capacitance current, a wide potential window, high conductivity and large porosity” [ 41 ]. Moreover, by combining with some 2D materials, catalysis or positron-electron recombination management is generated which further optimizes the performance of these sensors.…”

Section: Electrochemical Biomarker Sensorsmentioning

confidence: 99%

“…And in the same year, Govindasamy et al developed another electrochemical sensor for α -amino acid detection by using SrTiO 3 @rGO-modified electrode. In their work, these nanocomposites played a vital role in the improvement of sensor performance [ 41 ]. Sriram et al exhibited wonderful performance with biomarkers of uric acid, using the Fe 3 O 4 NPs@rGOs, as an electrocatalyst which was modified onto GCE and amplified output signals [ 52 ].…”

Section: Electrochemical Biomarker Sensorsmentioning

confidence: 99%

Recent Progress of Biomarker Detection Sensors

Liu

Cui

2020

Research

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Early cancer diagnosis and treatment are crucial research fields of human health. One method that has proven efficient is biomarker detection which can provide real-time and accurate biological information for early diagnosis. This review presents several biomarker sensors based on electrochemistry, surface plasmon resonance (SPR), nanowires, other nanostructures, and, most recently, metamaterials which have also shown their mechanisms and prospects in application in recent years. Compared with previous reviews, electrochemistry-based biomarker sensors have been classified into three strategies according to their optimizing methods in this review. This makes it more convenient for researchers to find a specific fabrication method to improve the performance of their sensors. Besides that, as microfabrication technologies have improved and novel materials are explored, some novel biomarker sensors—such as nanowire-based and metamaterial-based biomarker sensors—have also been investigated and summarized in this review, which can exhibit ultrahigh resolution, sensitivity, and limit of detection (LoD) in a more complex detection environment. The purpose of this review is to understand the present by reviewing the past. Researchers can break through bottlenecks of existing biomarker sensors by reviewing previous works and finally meet the various complex detection needs for the early diagnosis of human cancer.

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Facile sonochemical synthesis of perovskite-type SrTiO3 nanocubes with reduced graphene oxide nanocatalyst for an enhanced electrochemical detection of α-amino acid (tryptophan)

Cited by 95 publications

References 55 publications

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Sensitive Detection of Dengue Virus Type 2 E-Proteins Signals Using Self-Assembled Monolayers/Reduced Graphene Oxide-PAMAM Dendrimer Thin Film-SPR Optical Sensor

Advanced materials and technologies for supercapacitors used in energy conversion and storage: a review

Recent Progress of Biomarker Detection Sensors

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