Dual enzyme mimicry exhibited by ITO nanocubes and their application in spectrophotometric and electrochemical sensing

Aneesh, K.; Vusa, Chiranjeevi Srinivasa Rao; Berchmans, Sheela

doi:10.1039/c6an00811a

Cited by 13 publications

(5 citation statements)

References 36 publications

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“…The presence of C 1 s shall be ascribed to the pump oil in the vacuum system of the XPS equipment or the organic layer coating the surface of ZnO: Ga@ITO nanotowers [ 36 ]. The high-resolution In 3d spectrum ( Figure 4 b) shows that two peaks at 443.8 and 451.4 eV correspond to the In 3d 5/2 and 3d 3/2 , respectively, with binding energies of In(III) [ 37 ]. The high-resolution Sn 3d spectrum ( Figure 4 c) reveals that two peaks at 485.6 and 494.2 eV correspond to the Sn 3d 5/2 and 3d 3/2 , respectively, with binding energies of Sn(IV) [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability

et al. 2022

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Vertically aligned ZnO: Ga nanotowers can be directly synthesized on a glass substrate with a ZnO seed film via the chemical bath method. A novel heterostructure of ZnO: Ga@ITO@Ag nanotowers was subsequently deposited in the ITO layer and Ag nanoparticles via the facile two-step ion-sputtering processes on the ZnO: Ga nanotowers. The appropriate ion-sputtering times of the ITO layer and Ag nanoparticles can benefit the fabrication of ZnO: Ga@ITO@Ag nanotowers with higher surface-enhanced Raman scattering (SERS) enhancement in detecting rhodamine 6G (R6G) molecules. Compared with ZnO: Ga@Ag nanotowers, ZnO: Ga@ITO@Ag nanotowers exhibited a high SERS enhancement factor of 2.25 × 108 and a lower detection limit (10−14 M) for detecting R6G molecules. In addition, the ITO layer used as an intermediate layer between ZnO: Ga nanotowers and Ag nanoparticles can improve SERS enhancement, sensitivity, uniformity, reusability, detection limit, and stability for detecting amoxicillin molecules. This phenomenon shall be ascribed to the ITO layer exhibiting a synergistic Raman enhancement effect through interfacial charge transfer for enhancing SERS activity. As a result, ZnO: Ga@ITO@Ag nanotowers can construct a three-dimensional SERS substrate for potential applications in environmentally friendly and cost-effective chemical or drug detection.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability

et al. 2022

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“…Biosensors are receptor-transducer type devices that can convert a biological response to a readable output [109,110]. Recently, owing to the wide range of diagnosis applications for precise healthcare monitoring, the design and development of sensor materials have become center stage for the development of biosensors where advanced materials play a key role [111][112][113][114].…”

Section: Biosensor and Smart Sensor Applicationsmentioning

confidence: 99%

Advances of MXenes; Perspectives on Biomedical Research

2022

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The last decade witnessed the emergence of a new family of 2D transition metal carbides and nitrides named MXenes, which quickly gained momentum due to their exceptional electrical, mechanical, optical, and tunable functionalities. These outstanding properties also rendered them attractive materials for biomedical and biosensing applications, including drug delivery systems, antimicrobial applications, tissue engineering, sensor probes, auxiliary agents for photothermal therapy and hyperthermia applications, etc. The hydrophilic nature of MXenes with rich surface functional groups is advantageous for biomedical applications over hydrophobic nanoparticles that may require complicated surface modifications. As an emerging 2D material with numerous phases and endless possible combinations with other 2D materials, 1D materials, nanoparticles, macromolecules, polymers, etc., MXenes opened a vast terra incognita for diverse biomedical applications. Recently, MXene research picked up the pace and resulted in a flood of literature reports with significant advancements in the biomedical field. In this context, this review will discuss the recent advancements, design principles, and working mechanisms of some interesting MXene-based biomedical applications. It also includes major progress, as well as key challenges of various types of MXenes and functional MXenes in conjugation with drug molecules, metallic nanoparticles, polymeric substrates, and other macromolecules. Finally, the future possibilities and challenges of this magnificent material are discussed in detail.

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“…Catalase is believed to decompose H 2 O 2 into H 2 O and O 2 effectively. Many nanomaterials such as metal oxides, metals and PB exhibit the type of activities linked with catalase [105][106][107][108][109][110][111][112]. It was noted that nanoparticles had activities similar to catalase with another catalyst-impersonating function, and pH or temp could have made the catalyst impersonating action predominant.…”

Section: Catalase Mimicsmentioning

confidence: 99%

Potentiality of Nanoenzymes for Cancer Treatment and Other Diseases: Current Status and Future Challenges

et al. 2021

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Studies from past years have observed various enzymes that are artificial, which are issued to mimic naturally occurring enzymes based on their function and structure. The nanozymes possess nanomaterials that resemble natural enzymes and are considered an innovative class. This innovative class has achieved a brilliant response from various developments and researchers owing to this unique property. In this regard, numerous nanomaterials are inspected as natural enzyme mimics for multiple types of applications, such as imaging, water treatment, therapeutics, and sensing. Nanozymes have nanomaterial properties occurring with an inheritance that provides a single substitute and multiple platforms. Nanozymes can be controlled remotely via stimuli including heat, light, magnetic field, and ultrasound. Collectively, these all can be used to increase the therapeutic as well as diagnostic efficacies. These nanozymes have major biomedical applications including cancer therapy and diagnosis, medical diagnostics, and bio sensing. We summarized and emphasized the latest progress of nanozymes, including their biomedical mechanisms and applications involving synergistic and remote control nanozymes. Finally, we cover the challenges and limitations of further improving therapeutic applications and provide a future direction for using engineered nanozymes with enhanced biomedical and diagnostic applications.

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Dual enzyme mimicry exhibited by ITO nanocubes and their application in spectrophotometric and electrochemical sensing

Cited by 13 publications

References 36 publications

Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability

Fabrication of Three-Dimensional ZnO: Ga@ITO@Ag SERS-Active Substrate for Sensitive and Repeatable Detectability

Advances of MXenes; Perspectives on Biomedical Research

Potentiality of Nanoenzymes for Cancer Treatment and Other Diseases: Current Status and Future Challenges

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