Graphene and its Derivatives-Based Optical Sensors

Gao, Xiao‐Guang; Cheng, Lingxiao; Jiang, Wenshuai; Li, Xiao‐Kuan; Xing, Fei

doi:10.3389/fchem.2021.615164

Cited by 54 publications

(29 citation statements)

References 124 publications

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“…Moreover, the required irradiation for effective degradation of a pollutant may vary according to the accompanying nanomaterials in a graphene nanocomposite. Graphene retains the optical properties typical for different wavelengths of irradiations which can be tuned by tuning its electronic properties with the use of different techniques (Gao et al, 2021). This enables application of graphene-based nanocomposite for degradation/ removal of different types of pollutants from wastewater.…”

Section: Graphene Nanocomposites For Wastewater Treatmentmentioning

confidence: 99%

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Thakre

Barai

Bhanvase

2021

Water Environment Research

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Technologies for wastewater remediation have been growing ever since the environmental and health concern is realized. Development of nanomaterials has enabled mankind to have different methods to treat the various kinds of inorganic and organic pollutants present in wastewater from many resources.Among the many materials, semiconductor materials have found many environmental applications due to their outstanding photocatalytic activities. TiO 2 and ZnO are more effectively used as photocatalyst or adsorbents in the withdrawal of inorganic as well as organic wastes from the wastewater. On the other hand, graphene is tremendously being investigated for applications in environmental remediation in view of the superior physical, optical, thermal, and electronic properties of graphene nanocomposites. In this work, graphene-TiO 2 and graphene-ZnO nanocomposites have been reviewed for photocatalytic wastewater treatment. The various preparation techniques of these nanocomposites have been discussed. Also, different design strategies for graphene-based photocatalyst have been revealed. These nanocomposites exhibit promising applications in most of the water purification processes which are reviewed in this work. Along with this, the development of these nanocomposites using biomass-derived graphene has also been introduced. Practitioner Points• Graphene-TiO 2 and graphene-ZnO nanocomposites are effective for wastewater treatment through photocatalysis.• These nanocomposite photocatalysts have been used in the form of membrane as well as antibacterial agents.• Synthetic strategies and design considerations of graphene-based photocatalyst play a major role.• Biomass-derived graphene-TiO 2 and graphene-ZnO nanocomposites have also found application in wastewater treatment.

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Section: Graphene Nanocomposites For Wastewater Treatmentmentioning

confidence: 99%

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Thakre

Barai

Bhanvase

2021

Water Environment Research

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“…For instance, absorption of interfering molecules on the graphene THz or optical antennas can change the refractive index of the antenna surface, which in turn affects the propagation of surface plasmonic waves (Rodrigo et al, 2015). A similar effect can be observed on graphene-oxidebased optical antennas, whose fluorescent properties are affected by the pH change in the medium due to the interfering chemical molecules (Gao, 2021). This challenge can be addressed by identifying all the possible cross-modality interferences and developing the necessary channel and network coding methods.…”

Section: Cross-modality Interferencementioning

confidence: 83%

Universal Transceivers: Opportunities and Future Directions for the Internet of Everything (IoE)

et al. 2021

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The Internet of Everything (IoE) is a recently introduced information and communication technology (ICT) framework promising for extending the human connectivity to the entire universe, which itself can be regarded as a natural IoE, an interconnected network of everything we perceive. The countless number of opportunities that can be enabled by IoE through a blend of heterogeneous ICT technologies across different scales and environments and a seamless interface with the natural IoE impose several fundamental challenges, such as interoperability, ubiquitous connectivity, energy efficiency, and miniaturization. The key to address these challenges is to advance our communication technology to match the multi-scale, multi-modal, and dynamic features of the natural IoE. To this end, we introduce a new communication device concept, namely the universal IoE transceiver, that encompasses transceiver architectures that are characterized by multi-modality in communication (with modalities such as molecular, RF/THz, optical and acoustic) and in energy harvesting (with modalities such as mechanical, solar, biochemical), modularity, tunability, and scalability. Focusing on these fundamental traits, we provide an overview of the opportunities that can be opened up by micro/nanoscale universal transceiver architectures towards realizing the IoE applications. We also discuss the most pressing challenges in implementing such transceivers and briefly review the open research directions. Our discussion is particularly focused on the opportunities and challenges pertaining to the IoE physical layer, which can enable the efficient and effective design of higher-level techniques. We believe that such universal transceivers can pave the way for seamless connection and communication with the universe at a deeper level and pioneer the construction of the forthcoming IoE landscape.Index Terms– Internet of Everything, Universal IoE Transceiver, Interoperability, Multi-modality, Hybrid Energy Harvesting, Molecular Communications, THz Communications, Graphene and related nanomaterials.

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“… 152 (b) The application of graphene in optical sensing. 154 Reprinted with permission from Gao et al , Front. Chem.…”

Section: Insight Into Graphene-based Optical Biosensorsmentioning

confidence: 99%

Fast, accurate, point-of-care COVID-19 pandemic diagnosis enabled through advanced lab-on-chip optical biosensors: Opportunities and challenges

Asghari

Wang

Yoo

et al. 2021

Applied Physics Reviews

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The sudden rise of the worldwide severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic in early 2020 has called into drastic action measures to perform instant detection and reduce the rate of spread. Common clinical and nonclinical diagnostic testing methods have been partially effective in satisfying the increasing demand for fast detection point-of-care (POC) methods to slow down further spread. However, accurate point-of-risk diagnosis of this emerging viral infection is paramount as the need for simultaneous standard operating procedures and symptom management of SARS-CoV-2 will be the norm for years to come. A sensitive, cost-effective biosensor with mass production capability is crucial until a universal vaccination becomes available. Optical biosensors can provide a noninvasive, extremely sensitive rapid detection platform with sensitivity down to ∼67 fg/ml (1 fM) concentration in a few minutes. These biosensors can be manufactured on a mass scale (millions) to detect the COVID-19 viral load in nasal, saliva, urine, and serological samples, even if the infected person is asymptotic. Methods investigated here are the most advanced available platforms for biosensing optical devices that have resulted from the integration of state-of-the-art designs and materials. These approaches include, but are not limited to, integrated optical devices, plasmonic resonance, and emerging nanomaterial biosensors. The lab-on-chip platforms examined here are suitable not only for SARS-CoV-2 spike protein detection but also for other contagious virions such as influenza and Middle East respiratory syndrome (MERS).

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Graphene and its Derivatives-Based Optical Sensors

Cited by 54 publications

References 124 publications

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Universal Transceivers: Opportunities and Future Directions for the Internet of Everything (IoE)

Fast, accurate, point-of-care COVID-19 pandemic diagnosis enabled through advanced lab-on-chip optical biosensors: Opportunities and challenges

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Graphene and its Derivatives-Based Optical Sensors

Cited by 54 publications

References 124 publications

A review of graphene‐TiO2 and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

A review of graphene‐TiO2 and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Universal Transceivers: Opportunities and Future Directions for the Internet of Everything (IoE)

Fast, accurate, point-of-care COVID-19 pandemic diagnosis enabled through advanced lab-on-chip optical biosensors: Opportunities and challenges

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A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment