Pub Date : 2023-05-12DOI: 10.2174/1876402915666230512151346
J. Akhtar, Ashfa Zubair, Pooja, Badruddeen, Mohammad Irfan Khan, Mohammad Ahmad
The basic objective of this review is to furnish extensive confirmation on the bioactive chemical compounds and pharmacological aspects of Nagarmotha, i.e., Cyperus scariosus of the family Cyperaceae and some others plants used to treat various diseases of eyes as mentioned in Ayurveda, Charaka Samhita, and Sushrut Samhita. Nagarmotha showed an extensive ethnomedicinal record and constituted a phytonutrient pool of heuristic medicinal value. Various observations on pharmacological affirmation have illustrated the potential of plants as antioxidant, hypotensive, stimulant of the central nervous system, hepatoprotective, antidiabetic, analgesic, ophthalmic, anti-inflammatory, astringent, and antimicrobial actions which aid its conventional benefits. Nagarmotha remained to be an important part of various prescriptions used in nearly all indigenous systems of medicines to cure a variety of ailments. Various investigations on bioactive chemical compounds revealed that Cyperus scariosus has countless essential components like essential oils, terpenoids, sesquiterpenes, hydrocarbons, steroidal saponins, ketones, cyperene, cyperol, cyprotene, flavonoids, and various polyphenolic compounds. In the present work, more emphasis is on the bioactive chemical compounds, enlistment of bioactive chemical compounds responsible for therapeutic values, conventional benefits, and their detailed reported pharmacological properties. Some of the available marketed ayurvedic preparations were also mentioned in this review. Overall, researchers may get assisted and synchronized for impending potency, profitability, and effectiveness of Nagarmotha especially, and other medicinal plants generally. The demand for herbal products is expanding immensely all around the world and several biopharmaceutical regions are nowadays managing substantial research on herbal materials for their promising medicative value. Further curative usefulness of various phytochemicals obtained from Cyperus scariosus may be validated and corroborated.
{"title":"Nagarmotha: A Useful Medicinal Plant and its Synergistic Ophthalmic Formulations","authors":"J. Akhtar, Ashfa Zubair, Pooja, Badruddeen, Mohammad Irfan Khan, Mohammad Ahmad","doi":"10.2174/1876402915666230512151346","DOIUrl":"https://doi.org/10.2174/1876402915666230512151346","url":null,"abstract":"\u0000\u0000The basic objective of this review is to furnish extensive confirmation on the bioactive chemical compounds and pharmacological aspects of Nagarmotha, i.e., Cyperus scariosus of the family Cyperaceae and some others plants used to treat various diseases of eyes as mentioned in Ayurveda, Charaka Samhita, and Sushrut Samhita. Nagarmotha showed an extensive ethnomedicinal record and constituted a phytonutrient pool of heuristic medicinal value. Various observations on pharmacological affirmation have illustrated the potential of plants as antioxidant, hypotensive, stimulant of the central nervous system, hepatoprotective, antidiabetic, analgesic, ophthalmic, anti-inflammatory, astringent, and antimicrobial actions which aid its conventional benefits. Nagarmotha remained to be an important part of various prescriptions used in nearly all indigenous systems of medicines to cure a variety of ailments. Various investigations on bioactive chemical compounds revealed that Cyperus scariosus has countless essential components like essential oils, terpenoids, sesquiterpenes, hydrocarbons, steroidal saponins, ketones, cyperene, cyperol, cyprotene, flavonoids, and various polyphenolic compounds. In the present work, more emphasis is on the bioactive chemical compounds, enlistment of bioactive chemical compounds responsible for therapeutic values, conventional benefits, and their detailed reported pharmacological properties. Some of the available marketed ayurvedic preparations were also mentioned in this review. Overall, researchers may get assisted and synchronized for impending potency, profitability, and effectiveness of Nagarmotha especially, and other medicinal plants generally. The demand for herbal products is expanding immensely all around the world and several biopharmaceutical regions are nowadays managing substantial research on herbal materials for their promising medicative value. Further curative usefulness of various phytochemicals obtained from Cyperus scariosus may be validated and corroborated.\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48251718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-08DOI: 10.2174/1876402915666230508155922
S. K. Sinha, S. Chander, Rekha Chaudhary
Internet of Things (IoT) applications require high-performance TFET devices that can be efficiently integrated with the cyber world and physical world. The impact of introducing Gaussian traps in hetero-junction tunneling-field-effect-transistors (TFET) with an L-shaped gate is presented. The 2-D TCAD study of different characteristics, like input, output characteristics, and noise spectral density with trap and without trap, has been performed. The simulation results showed that in L-shaped TFET (L_TFET), the high on-current of 1.93×10-5 A/µm, low off-current/leakage current of 1.09×10-13 A/µm, and steep sub-threshold slope (SS) of 24 mV/dec without traps and on-current of 8.46×10-6 A/µm, off-current of 2.86×10-11 A/µm, and degraded SS with traps are observed. They also indicated that the presence of traps reduces gate-drain capacitance (Cgd), while gate-source capacitance (Cgs) remains unaffected. In addition, in L_TFET, the drain current noise spectral density (SID) of 7.63 E-21 (A2/Hz) at LF and 2.69 E-26 (A2/Hz) at HF while the noise voltage spectral density (SVG) of 7.33 E-4 (V2/Hz) at LF and 2.59 E-15 (V2/Hz) at HF without traps have been investigated in this study. The inverse dependence of drain current noise spectral density on frequency has been observed to lower the effect of noise at HF. It can be concluded that the proposed L_TFET device is free from ambipolarity conduction and can be well-suited for low-power applications.
{"title":"Impact of Gaussian Traps on the Characteristics of L-Shaped Tunnel Field-Effect Transistor","authors":"S. K. Sinha, S. Chander, Rekha Chaudhary","doi":"10.2174/1876402915666230508155922","DOIUrl":"https://doi.org/10.2174/1876402915666230508155922","url":null,"abstract":"\u0000\u0000Internet of Things (IoT) applications require high-performance TFET devices that can be efficiently integrated with the cyber world and physical world.\u0000\u0000\u0000\u0000The impact of introducing Gaussian traps in hetero-junction tunneling-field-effect-transistors (TFET) with an L-shaped gate is presented.\u0000\u0000\u0000\u0000The 2-D TCAD study of different characteristics, like input, output characteristics, and noise spectral density with trap and without trap, has been performed.\u0000\u0000\u0000\u0000The simulation results showed that in L-shaped TFET (L_TFET), the high on-current of 1.93×10-5 A/µm, low off-current/leakage current of 1.09×10-13 A/µm, and steep sub-threshold slope (SS) of 24 mV/dec without traps and on-current of 8.46×10-6 A/µm, off-current of 2.86×10-11 A/µm, and degraded SS with traps are observed. They also indicated that the presence of traps reduces gate-drain capacitance (Cgd), while gate-source capacitance (Cgs) remains unaffected. In addition, in L_TFET, the drain current noise spectral density (SID) of 7.63 E-21 (A2/Hz) at LF and 2.69 E-26 (A2/Hz) at HF while the noise voltage spectral density (SVG) of 7.33 E-4 (V2/Hz) at LF and 2.59 E-15 (V2/Hz) at HF without traps have been investigated in this study. The inverse dependence of drain current noise spectral density on frequency has been observed to lower the effect of noise at HF.\u0000\u0000\u0000\u0000It can be concluded that the proposed L_TFET device is free from ambipolarity conduction and can be well-suited for low-power applications.\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41686574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-05DOI: 10.2174/1876402915666230405132640
S. Karadgi, Prabhakar M Bhovi, A. Patil, R. Keshavamurthy, Venkateswarlu K, Terence G. Langdon
Additive Manufacturing (AM) is considered one of the key technologies for realizing Industry 4.0. There are numerous stages in the end-to-end AM process, including component design, material design, build, and so on. An enormous amount of data is generated along the end-to-end AM process that can be acquired from the 3D printer in real-time, micro-characterization studies, and process plan details, among others. For instance, these data can be employed to predict the printed components’ quality and, at the same time, proactively adapt the 3D printer parameters to achieve better quality. This end-to-end AM process can be mapped onto the digital thread. The current article elaborates on a conceptual framework to acquire the data from various sources associated with the end-to-end AM process and realize monitoring and control of the end-to-end AM process, leading to an intelligent AM process.
{"title":"A Conceptual Framework Towards the Realization of In Situ Monitoring and Control of End-to-End Additive Manufacturing Process","authors":"S. Karadgi, Prabhakar M Bhovi, A. Patil, R. Keshavamurthy, Venkateswarlu K, Terence G. Langdon","doi":"10.2174/1876402915666230405132640","DOIUrl":"https://doi.org/10.2174/1876402915666230405132640","url":null,"abstract":"\u0000\u0000Additive Manufacturing (AM) is considered one of the key technologies for realizing Industry 4.0. There are numerous stages in the end-to-end AM process, including component design, material design, build, and so on. An enormous amount of data is generated along the end-to-end AM process that can be acquired from the 3D printer in real-time, micro-characterization studies, and process plan details, among others. For instance, these data can be employed to predict the printed components’ quality and, at the same time, proactively adapt the 3D printer parameters to achieve better quality. This end-to-end AM process can be mapped onto the digital thread. The current article elaborates on a conceptual framework to acquire the data from various sources associated with the end-to-end AM process and realize monitoring and control of the end-to-end AM process, leading to an intelligent AM process.\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47762141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-20DOI: 10.2174/1876402915666230320103405
L. Pei, Zizhan Sun, Xiaoyu Wang, Z. Xue, Z. Cai, C. Fan
Metal surface modification of the photocatalysts is effective for enhancing the photocatalytic properties of the semiconductor photocatalysts. Nd can be used as the modified metal for the enhancement of catalytic performance of the strontium tin hydroxide (SrSn(OH)6) nanorods due to expanding the light absorption range and reducing the recombination of the photo-generated electrons and holes. The aim of the research is to synthesize Nd-modified SrSn(OH)6 nanorods and investigate the enhanced photocatalytic performance for crystal violet degradation. Nd modified SrSn(OH)6 nanorods were prepared via a facile one-step in-situ photo-deposition route. The obtained nanorods were analyzed by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, solid diffuse reflectance spectra, photoluminescence spectroscopy, and electrochemical impedance spectroscopy. Nd modified SrSn(OH)6 nanorods were prepared via a facile one-step in-situ photo-deposition route. The obtained nanorods were analyzed by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, solid diffuse reflectance spectra, photoluminescence spectroscopy and electrochemical impedance spectroscopy. Nd attached to the surface of nanorods. The band gap of the Nd-modified SrSn(OH)6 nanorods was reduced due to Nd modification at the surface of nanorods. The Nd-modified SrSn(OH)6 nanorods showed enhanced photocatalytic properties for crystal violet (CV) degradation under ultraviolet (UV) light irradiation than the SrSn(OH)6 nanorods. Nd modified SrSn(OH)6 nanorods have lower charge transfer resistance and more efficient charge separation ability, thus hindering the recombination of the electrons and holes (e−/h+) pairs. Scavenger experiments reported that the holes, superoxide, and hydroxyl radicals are the main reactive species during the photocatalytic reaction. The Nd-modified SrSn(OH)6 nanorods were found to be recoverable and reusable for CV degradation. Nd nanoscale particles attach to the surface of the nanorods. The band gap of the Nd modified SrSn(OH)6 nanorods is reduced due to the Nd modification at the surface of the nanorods. The Nd modified SrSn(OH)6 nanorods show enhanced photocatalytic properties for crystal violet (CV) degradation under ultraviolet (UV) light irradiation than the SrSn(OH)6 nanorods. Nd modified SrSn(OH)6 nanorods have lower charge transfer resistant and more efficient charge separation ability hindering the recombination of the electrons and holes (e−/h+) pairs. Scavenger experiments show that the holes, superoxide and hydroxyl radicals are the main reactive species during the photocatalytic reaction. The Nd modified SrSn(OH)6 nanorods are recoverable and reusable for the CV degradation. The Nd modified SrSn(OH)6 nanorods showed enhanced photocatalytic performance towards crystal violet than
{"title":"In-situ Photo-deposition of Nd-modified Hexahydroxy Strontium Stannate Nanorods with Enhanced Photocatalytic Performance","authors":"L. Pei, Zizhan Sun, Xiaoyu Wang, Z. Xue, Z. Cai, C. Fan","doi":"10.2174/1876402915666230320103405","DOIUrl":"https://doi.org/10.2174/1876402915666230320103405","url":null,"abstract":"\u0000\u0000Metal surface modification of the photocatalysts is effective for enhancing the photocatalytic properties of the semiconductor photocatalysts. Nd can be used as the modified metal for the enhancement of catalytic performance of the strontium tin hydroxide (SrSn(OH)6) nanorods due to expanding the light absorption range and reducing the recombination of the photo-generated electrons and holes.\u0000\u0000\u0000\u0000The aim of the research is to synthesize Nd-modified SrSn(OH)6 nanorods and investigate the enhanced photocatalytic performance for crystal violet degradation.\u0000\u0000\u0000\u0000Nd modified SrSn(OH)6 nanorods were prepared via a facile one-step in-situ photo-deposition route. The obtained nanorods were analyzed by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, solid diffuse reflectance spectra, photoluminescence spectroscopy, and electrochemical impedance spectroscopy.\u0000\u0000\u0000\u0000Nd modified SrSn(OH)6 nanorods were prepared via a facile one-step in-situ photo-deposition route. The obtained nanorods were analyzed by X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, solid diffuse reflectance spectra, photoluminescence spectroscopy and electrochemical impedance spectroscopy.\u0000\u0000\u0000\u0000Nd attached to the surface of nanorods. The band gap of the Nd-modified SrSn(OH)6 nanorods was reduced due to Nd modification at the surface of nanorods. The Nd-modified SrSn(OH)6 nanorods showed enhanced photocatalytic properties for crystal violet (CV) degradation under ultraviolet (UV) light irradiation than the SrSn(OH)6 nanorods. Nd modified SrSn(OH)6 nanorods have lower charge transfer resistance and more efficient charge separation ability, thus hindering the recombination of the electrons and holes (e−/h+) pairs. Scavenger experiments reported that the holes, superoxide, and hydroxyl radicals are the main reactive species during the photocatalytic reaction. The Nd-modified SrSn(OH)6 nanorods were found to be recoverable and reusable for CV degradation.\u0000\u0000\u0000\u0000Nd nanoscale particles attach to the surface of the nanorods. The band gap of the Nd modified SrSn(OH)6 nanorods is reduced due to the Nd modification at the surface of the nanorods. The Nd modified SrSn(OH)6 nanorods show enhanced photocatalytic properties for crystal violet (CV) degradation under ultraviolet (UV) light irradiation than the SrSn(OH)6 nanorods. Nd modified SrSn(OH)6 nanorods have lower charge transfer resistant and more efficient charge separation ability hindering the recombination of the electrons and holes (e−/h+) pairs. Scavenger experiments show that the holes, superoxide and hydroxyl radicals are the main reactive species during the photocatalytic reaction. The Nd modified SrSn(OH)6 nanorods are recoverable and reusable for the CV degradation.\u0000\u0000\u0000\u0000The Nd modified SrSn(OH)6 nanorods showed enhanced photocatalytic performance towards crystal violet than","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43945753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-09DOI: 10.2174/1876402915666230209140024
S. Kontomaris, A. Malamou
Atomic Force Microscopy (AFM) nanoindentation is the principal method for the characterization of soft materials at the nanoscale. In most cases, pyramidal tips are used and approximated to perfect cones. However, the extended use of the AFM tip may alter its sharpness. In many cases, a truncated cone shape is appropriate for tip modeling. In this technical note, the equation that relates the force with the indentation depth when indenting an elastic half-space using a truncated cone is derived. The nanoindentation equation for a truncated cone tip is derived using the fundamental differential equation that relates the sample’s contact stiffness with Young’s modulus. When fitting Sneddon’s equation (which is valid for a perfect cone) on data obtained using a truncated cone-shaped AFM tip, the results show a ‘pseudo-softening’ behavior. The AFM tip's sharpness in nanoindentation experiments is a crucial parameter for obtaining the correct mechanical patterns of unknown samples.
{"title":"The truncated cone effect in AFM nanoindentation on soft materials","authors":"S. Kontomaris, A. Malamou","doi":"10.2174/1876402915666230209140024","DOIUrl":"https://doi.org/10.2174/1876402915666230209140024","url":null,"abstract":"\u0000\u0000Atomic Force Microscopy (AFM) nanoindentation is the principal method for the characterization of soft materials at the nanoscale. In most cases, pyramidal tips are used and approximated to perfect cones. However, the extended use of the AFM tip may alter its sharpness.\u0000\u0000\u0000\u0000In many cases, a truncated cone shape is appropriate for tip modeling. In this technical note, the equation that relates the force with the indentation depth when indenting an elastic half-space using a truncated cone is derived.\u0000\u0000\u0000\u0000The nanoindentation equation for a truncated cone tip is derived using the fundamental differential equation that relates the sample’s contact stiffness with Young’s modulus.\u0000\u0000\u0000\u0000When fitting Sneddon’s equation (which is valid for a perfect cone) on data obtained using a truncated cone-shaped AFM tip, the results show a ‘pseudo-softening’ behavior.\u0000\u0000\u0000\u0000The AFM tip's sharpness in nanoindentation experiments is a crucial parameter for obtaining the correct mechanical patterns of unknown samples.\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48467161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-05DOI: 10.2174/1876402914666221005092629
Sudhanshu Mishra
Smart healthcare is a healthcare delivery method that utilizes wearable devices, the internet of things, and the mobile internet to dynamically access information, connect people, materials, and institutions in the healthcare industry, and then intelligently monitor and respond to the medical ecosystem requirements. The concept of smart healthcare has progressively gained traction as information technology advances likee Telemedicine and Robotics. The purpose of the internet of things (IoT) is to connect many effects and items present in the surroundings so they may communicate and work together "anytime, anywhere, with anything and anyone, flawlessly using any path or network and any service."Smart healthcare employs a new generation of information technologies, such as the IoT, big data, cloud computing, and artificial intelligence, to completely revolutionize the existing medical system, making it more efficient, easy, and personalized. Thereby, to introduce the concept of “smart healthcare”, foremost, we identify the essential technologies that support it and discuss the current state of smart healthcare in a few key areas.
{"title":"Internet of Things- Implementation in Healthcare with Telemedicine & Robotic","authors":"Sudhanshu Mishra","doi":"10.2174/1876402914666221005092629","DOIUrl":"https://doi.org/10.2174/1876402914666221005092629","url":null,"abstract":"\u0000\u0000Smart healthcare is a healthcare delivery method that utilizes wearable devices, the internet of things, and the mobile internet to dynamically access information, connect people, materials, and institutions in the healthcare industry, and then intelligently monitor and respond to the medical ecosystem requirements. The concept of smart healthcare has progressively gained traction as information technology advances likee Telemedicine and Robotics. The purpose of the internet of things (IoT) is to connect many effects and items present in the surroundings so they may communicate and work together \"anytime, anywhere, with anything and anyone, flawlessly using any path or network and any service.\"Smart healthcare employs a new generation of information technologies, such as the IoT, big data, cloud computing, and artificial intelligence, to completely revolutionize the existing medical system, making it more efficient, easy, and personalized. Thereby, to introduce the concept of “smart healthcare”, foremost, we identify the essential technologies that support it and discuss the current state of smart healthcare in a few key areas.\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45357213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-28DOI: 10.2174/1876402914666220628145557
Ning Ma, Haiyong He
Heterostructures with nanoscale sizes have great superiorities in photocatalytic environment decontaminant because of their efficient interface charge transfer and great surface area. This work reports the facile fabrication of nano-tubular TiO2 and Si-doped TiO2 (NTs) hybridizing SnS nanocrystallites and their high-efficient photocatalytic activity. The modified hydrothermal processes were used to synthesize the nanotubes. A chemical bath deposition process was used to hybridize SnS nanocrystallines with the nanotubes. The fabricated nanostructures show wide light absorption in the UV-visible region. The SBET, light absorption, hydrophilicity, and photo-induced super hydrophilicity were enhanced by Si-doping and SnS modification. Moreover, high-efficient interface charge transfer was produced after the SnS modification and further enhanced by the Si doping because of band structure modulation. Thus, the Si-doped TiO2 nanotubes/SnS heterostructures showed remarkably enhanced photocatalytic and Fenton-like photocatalytic activity in dye wastewater treatment than the TiO2 NTs. This work suggests potential materials and their facile fabrication process for the photocatalytic application of environmental decontamination.
{"title":"Synthesis and photocatalytic activity of Si-doped TiO2 nanotube/SnS hybrids for environmental decontamination","authors":"Ning Ma, Haiyong He","doi":"10.2174/1876402914666220628145557","DOIUrl":"https://doi.org/10.2174/1876402914666220628145557","url":null,"abstract":"\u0000\u0000Heterostructures with nanoscale sizes have great superiorities in photocatalytic environment decontaminant because of their efficient interface charge transfer and great surface area.\u0000\u0000\u0000\u0000This work reports the facile fabrication of nano-tubular TiO2 and Si-doped TiO2 (NTs) hybridizing SnS nanocrystallites and their high-efficient photocatalytic activity.\u0000\u0000\u0000\u0000The modified hydrothermal processes were used to synthesize the nanotubes. A chemical bath deposition process was used to hybridize SnS nanocrystallines with the nanotubes.\u0000\u0000\u0000\u0000The fabricated nanostructures show wide light absorption in the UV-visible region. The SBET, light absorption, hydrophilicity, and photo-induced super hydrophilicity were enhanced by Si-doping and SnS modification. Moreover, high-efficient interface charge transfer was produced after the SnS modification and further enhanced by the Si doping because of band structure modulation.\u0000\u0000\u0000\u0000Thus, the Si-doped TiO2 nanotubes/SnS heterostructures showed remarkably enhanced photocatalytic and Fenton-like photocatalytic activity in dye wastewater treatment than the TiO2 NTs. This work suggests potential materials and their facile fabrication process for the photocatalytic application of environmental decontamination.\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46906655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-23DOI: 10.2174/1876402914666220623145801
Pankaj Singh, A. Dubey, R. Singh
In a day-to--to-day life, everyone faces different kinds of dermal diseases, the only cure by conventional dosage forms having a high rate of side effects. This is a better and alternative approach in case of patients’ compliance and sustained drug release. To prepare solid dispersion for enhancement of solubility of roxithromycin and encapsulate solid dispersion into microspheres to decrease dose frequency and sustained release and incorporation of microspheres in situ gel for easy to utilize and adhere over the skin in microbial infection. Solid dispersion roxithromycin and HPMC at a ratio of 1:1 was prepared by melting method, and solubility was measured by in vitro dissolution rate. On the basis of 3² factorial design, 9 different formulations were evaluated by % drug release, particle size, and % entrapment efficiency. Lastly in situ gel was prepared by a cold method which evaluated through gelling time and temperature; in vitro gelation method. The solid dispersion found 1.3 times higher solubility than pure roxithromycin proved by in vitro drug release. Whereas, microsphere MF-9 selected as the best formulation via drug release (87.81%), entrapment efficiency (91.223%), % yield (86.681), and particle size (110µm). In-situ gel MIG-5 selected as the best formulation on the basis of drug content (89.326±0.564), viscosity (9551.666±6.233), and gelling time (25.333±2.054). Solid dispersion was prepared successfully with higher solubility than the pure drug. Microspheres have shown sustained drug release and in situ gels have a good adhesive property and MIG-5 further enhances the sustained drug release behaviour.
{"title":"Chitosan-grafted microspherical loaded In-situ gels for enhanced transdermal delivery of roxithromycin: In-vitro/Ex-vivo assessment","authors":"Pankaj Singh, A. Dubey, R. Singh","doi":"10.2174/1876402914666220623145801","DOIUrl":"https://doi.org/10.2174/1876402914666220623145801","url":null,"abstract":"\u0000\u0000In a day-to--to-day life, everyone faces different kinds of dermal diseases, the only cure by conventional dosage forms having a high rate of side effects. This is a better and alternative approach in case of patients’ compliance and sustained drug release.\u0000\u0000\u0000\u0000To prepare solid dispersion for enhancement of solubility of roxithromycin and encapsulate solid dispersion into microspheres to decrease dose frequency and sustained release and incorporation of microspheres in situ gel for easy to utilize and adhere over the skin in microbial infection.\u0000\u0000\u0000\u0000Solid dispersion roxithromycin and HPMC at a ratio of 1:1 was prepared by melting method, and solubility was measured by in vitro dissolution rate. On the basis of 3² factorial design, 9 different formulations were evaluated by % drug release, particle size, and % entrapment efficiency. Lastly in situ gel was prepared by a cold method which evaluated through gelling time and temperature; in vitro gelation method.\u0000\u0000\u0000\u0000The solid dispersion found 1.3 times higher solubility than pure roxithromycin proved by in vitro drug release. Whereas, microsphere MF-9 selected as the best formulation via drug release (87.81%), entrapment efficiency (91.223%), % yield (86.681), and particle size (110µm). In-situ gel MIG-5 selected as the best formulation on the basis of drug content (89.326±0.564), viscosity (9551.666±6.233), and gelling time (25.333±2.054).\u0000\u0000\u0000\u0000Solid dispersion was prepared successfully with higher solubility than the pure drug. Microspheres have shown sustained drug release and in situ gels have a good adhesive property and MIG-5 further enhances the sustained drug release behaviour.\u0000","PeriodicalId":18543,"journal":{"name":"Micro and Nanosystems","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43546839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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