Pub Date : 2025-01-03DOI: 10.1016/j.nwnano.2025.100073
Zainab Ali Abed Alhasani , Fouad N. Ajeel
We designed Y2CF2 monolayers by adding fluorine atoms in place of the anionic electrons in Y2C monolayers. The density functional theory (DFT) is used to investigate the structural and electronic properties of two-dimensional Y2C and Y2CF2 monolayers. According to the results of calculations, these monolayers are dynamically and thermodynamically stable. The structural and electronic properties of the Y2CF2 monolayer exhibit a semimetallic behavior. To study the potential applications of these new two-dimensional electride material, the adsorption and diffusion properties to atoms , , and are investigated. Our results indicate that the diffusion barriers of Li, Na, and Mg atoms on the Y₂CF₂ surface are 15.9 eV, 6.8 eV, and 28.6 eV, respectively. Because of their high adsorption energies and low diffusion barriers of metal atoms, Y2C and Y2CF2 monolayers are attractive electride materials for applications of metal-ion batteries. All of the findings contribute to the modification, stabilization, and understanding of two-dimensional electrides, as well as the practical use of their characteristics.
{"title":"DFT investigations of structural and electronic properties of two-dimensional Y2C and Y2CF2 monolayers","authors":"Zainab Ali Abed Alhasani , Fouad N. Ajeel","doi":"10.1016/j.nwnano.2025.100073","DOIUrl":"10.1016/j.nwnano.2025.100073","url":null,"abstract":"<div><div>We designed Y<sub>2</sub>CF<sub>2</sub> monolayers by adding fluorine atoms in place of the anionic electrons in Y<sub>2</sub>C monolayers. The density functional theory (DFT) is used to investigate the structural and electronic properties of two-dimensional Y<sub>2</sub>C and Y<sub>2</sub>CF<sub>2</sub> monolayers. According to the results of calculations, these monolayers are dynamically and thermodynamically stable. The structural and electronic properties of the Y<sub>2</sub>CF<sub>2</sub> monolayer exhibit a semimetallic behavior. To study the potential applications of these new two-dimensional electride material, the adsorption and diffusion properties to atoms <span><math><mtext>Li</mtext></math></span>, <span><math><mtext>Na</mtext></math></span>, and <span><math><mtext>Mg</mtext></math></span> are investigated. Our results indicate that the diffusion barriers of Li, Na, and Mg atoms on the Y₂CF₂ surface are 15.9 eV, 6.8 eV, and 28.6 eV, respectively. Because of their high adsorption energies and low diffusion barriers of metal atoms, Y<sub>2</sub>C and Y<sub>2</sub>CF<sub>2</sub> monolayers are attractive electride materials for applications of metal-ion batteries. All of the findings contribute to the modification, stabilization, and understanding of two-dimensional electrides, as well as the practical use of their characteristics.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100073"},"PeriodicalIF":0.0,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-03DOI: 10.1016/j.nwnano.2025.100072
Joseph N. Lutera , MN Raja Shekar , B Shankar Goud
Incompressible nanofluid flow applications have recently drawn significant attention among scientists and engineers. The dimensionless leading comparisons of this study are analytically executed using the Laplace transformation technique and graphically analyzed through the MATLAB software tool. The silver nanoparticles-water thermophysical properties framed this exploration setting. This study finds that magnetic activity slows down the speed of the nanofluid flow. The solutes are consumed during the chemical reaction process, declining the concentration of species. The augmentation in solid volume fraction sinks the velocity and upsurges the nanofluid's flow temperature. The permeability and thermal radiation constraints enhance the skin friction coefficient. These results provide valuable insights into designing and controlling mass and heat transmission in nanofluid-based schemes, such as creating heat exchangers, cooling schemes, electrochemical systems, and filtration processes in industries. It is also applicable in the health sector, for instance, by using a magnetic field to control the targeted area for drug injection in the human body.
{"title":"Scrutinization of chemical reactions, permeability, and magnetic field of a dissipative flow effects of Silver (Ag) nanoparticles – Water over a moving vertical porous medium","authors":"Joseph N. Lutera , MN Raja Shekar , B Shankar Goud","doi":"10.1016/j.nwnano.2025.100072","DOIUrl":"10.1016/j.nwnano.2025.100072","url":null,"abstract":"<div><div>Incompressible nanofluid flow applications have recently drawn significant attention among scientists and engineers. The dimensionless leading comparisons of this study are analytically executed using the Laplace transformation technique and graphically analyzed through the MATLAB software tool. The silver nanoparticles-water thermophysical properties framed this exploration setting. This study finds that magnetic activity slows down the speed of the nanofluid flow. The solutes are consumed during the chemical reaction process, declining the concentration of species. The augmentation in solid volume fraction sinks the velocity and upsurges the nanofluid's flow temperature. The permeability and thermal radiation constraints enhance the skin friction coefficient. These results provide valuable insights into designing and controlling mass and heat transmission in nanofluid-based schemes, such as creating heat exchangers, cooling schemes, electrochemical systems, and filtration processes in industries. It is also applicable in the health sector, for instance, by using a magnetic field to control the targeted area for drug injection in the human body.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100072"},"PeriodicalIF":0.0,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-30DOI: 10.1016/j.nwnano.2024.100071
D. Krishna Bhat , S. Pavan Kumar , U. Sandhya Shenoy
The efficiency of photovoltaic (PV) panels can be compromised by rising temperatures, prompting extensive research into thermal management strategies aimed at maximizing power output. Recently, there has been growing interest in using nanofluids to enhance the cooling efficiency of photovoltaic thermoelectric generator (PV-TEG) systems compared to conventional water cooling. This underscores the potential of investigating innovative synthetic methods to improve the thermal conductivity and stability of nanofluids. We employed a simple straightforward method to synthesize cuprous oxide nanofluid. This solution-based technique constrains formation of cuprous oxide particles to the nanoscale dimensions using cetylammonium bromide as capping agent. Our investigation delved into the impact of various parameters on the formation and dispersion of nanoparticles within a base fluid comprised of a 1:1 mixture of water and ethylene glycol. The resulting nanofluid exhibited Newtonian behaviour and demonstrated remarkable stability of 9 months, accompanied by a notable increase in thermal conductivity upto 3.59 W m-1 K-1. This meticulous approach has proven to be not only straightforward and dependable but also efficient for the rapid synthesis of highly stable Newtonian nanofluids overcoming the complexities associated with traditional two-step processes and could be extended to other metal oxide nanofluids. Beyond its economic appeal, the nanofluid's improved thermal properties and stability position it for diverse applications requiring efficient heat transfer.
{"title":"Enhancing the thermal conductivity and stability of cuprous oxide nanofluids: Ribose-mediated single step chemical synthesis for solar energy applications","authors":"D. Krishna Bhat , S. Pavan Kumar , U. Sandhya Shenoy","doi":"10.1016/j.nwnano.2024.100071","DOIUrl":"10.1016/j.nwnano.2024.100071","url":null,"abstract":"<div><div>The efficiency of photovoltaic (PV) panels can be compromised by rising temperatures, prompting extensive research into thermal management strategies aimed at maximizing power output. Recently, there has been growing interest in using nanofluids to enhance the cooling efficiency of photovoltaic thermoelectric generator (PV-TEG) systems compared to conventional water cooling. This underscores the potential of investigating innovative synthetic methods to improve the thermal conductivity and stability of nanofluids. We employed a simple straightforward method to synthesize cuprous oxide nanofluid. This solution-based technique constrains formation of cuprous oxide particles to the nanoscale dimensions using cetylammonium bromide as capping agent. Our investigation delved into the impact of various parameters on the formation and dispersion of nanoparticles within a base fluid comprised of a 1:1 mixture of water and ethylene glycol. The resulting nanofluid exhibited Newtonian behaviour and demonstrated remarkable stability of 9 months, accompanied by a notable increase in thermal conductivity upto 3.59 W m<sup>-1</sup> K<sup>-1</sup>. This meticulous approach has proven to be not only straightforward and dependable but also efficient for the rapid synthesis of highly stable Newtonian nanofluids overcoming the complexities associated with traditional two-step processes and could be extended to other metal oxide nanofluids. Beyond its economic appeal, the nanofluid's improved thermal properties and stability position it for diverse applications requiring efficient heat transfer.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100071"},"PeriodicalIF":0.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nanomaterial-based platforms for the formulation of bioactive compounds derived from essential oils (dEOs) have attracted considerable attention due to their potential to enhance the stability, controlled release, and antimicrobial efficacy of these natural compounds. This review analyzes the various nanomaterial platforms used for dEOs, including polymeric nanoparticles, liposomes, cyclodextrin and chitosan complexes, and inorganic nanosystems. The synthesis methods, physicochemical properties, and characterization techniques associated with these nanomaterial platforms are reviewed to elucidate their impact on the formulation and stability of dEOs. Furthermore, the antimicrobial activity of dEO formulations against a wide range of pathogenic microorganisms is described, highlighting the potential applications of these platforms in the treatment of infections and food preservation. The review also discusses the current challenges and prospects in the field, aiming to provide valuable insights for researchers and industry professionals involved in the development of nanomaterial-based dEO delivery systems.
{"title":"Nanoformulations of bioactive compounds derived from essential oils with antimicrobial activity","authors":"Valentina Nieto Marín , Danieli Fernanda Buccini , Viviane Gomes da Silva , Ian Alejandro Fernandez Soliz , Octávio Luiz Franco","doi":"10.1016/j.nwnano.2024.100070","DOIUrl":"10.1016/j.nwnano.2024.100070","url":null,"abstract":"<div><div>Nanomaterial-based platforms for the formulation of bioactive compounds derived from essential oils (dEOs) have attracted considerable attention due to their potential to enhance the stability, controlled release, and antimicrobial efficacy of these natural compounds. This review analyzes the various nanomaterial platforms used for dEOs, including polymeric nanoparticles, liposomes, cyclodextrin and chitosan complexes, and inorganic nanosystems. The synthesis methods, physicochemical properties, and characterization techniques associated with these nanomaterial platforms are reviewed to elucidate their impact on the formulation and stability of dEOs. Furthermore, the antimicrobial activity of dEO formulations against a wide range of pathogenic microorganisms is described, highlighting the potential applications of these platforms in the treatment of infections and food preservation. The review also discusses the current challenges and prospects in the field, aiming to provide valuable insights for researchers and industry professionals involved in the development of nanomaterial-based dEO delivery systems.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100070"},"PeriodicalIF":0.0,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-26DOI: 10.1016/j.nwnano.2024.100069
Mourad Smari , Riheb Hamdi , Said A. Mansour , Mohammad Y. Al-Haik , Yahya Zakaria , Yousef Haik
We report the structural and magnetic properties of sol-gel-synthesized Dy-doped La0.51Sr0.49MnO3 nanoparticles, which average ≈ 27–29 nm in size. The chemical composition was confirmed using energy dispersive X-ray analysis and X-ray photoelectron spectroscopy. The magnetization behavior of the samples showed clear evidence of a transition from ferromagnetic to paramagnetic states in all three cooling and warming processes: Zero Field-Cooled Warming, Field-Cooled Cooling, and Field-Cooled Warming. The Curie temperature exhibits a drop as the concentration of Dy3+ increases, from 372 K to 317 K. Approximately 95 % of the average refrigerant Gd material under 5T is found in the relative cooling power values of the La0.51Sr0.49MnO3 sample, which range from 62 to 387 J/kg when the applied magnetic field is changed from 1T to 5T. In maintaining with the mean-field theory, the critical exponents were determined to be (β = 0.541 and γ = 0.991 for Dy0.00), (β = 0.559 and γ = 0.954 for Dy0.045), and (β = 0.570 and γ = 1.103 for Dy0.09). Dysprosium doping does not alter the universality class, indicating that the material's fundamental behavior remains unaffected. This nanomaterial has a reasonably strong magnetocaloric response and is inexpensive, making it a possible material for active magnetic refrigerators.
{"title":"Dy-Doped La0.51Sr0.49MnO₃ nanoparticles: Tuning structural and magnetocaloric properties via Sol-Gel synthesis for energy-efficient applications","authors":"Mourad Smari , Riheb Hamdi , Said A. Mansour , Mohammad Y. Al-Haik , Yahya Zakaria , Yousef Haik","doi":"10.1016/j.nwnano.2024.100069","DOIUrl":"10.1016/j.nwnano.2024.100069","url":null,"abstract":"<div><div>We report the structural and magnetic properties of sol-gel-synthesized Dy-doped La<sub>0.51</sub>Sr<sub>0.49</sub>MnO<sub>3</sub> nanoparticles, which average ≈ 27–29 nm in size. The chemical composition was confirmed using energy dispersive X-ray analysis and X-ray photoelectron spectroscopy. The magnetization behavior of the samples showed clear evidence of a transition from ferromagnetic to paramagnetic states in all three cooling and warming processes: Zero Field-Cooled Warming, Field-Cooled Cooling, and Field-Cooled Warming. The Curie temperature exhibits a drop as the concentration of Dy<sup>3+</sup> increases, from 372 K to 317 K. Approximately 95 % of the average refrigerant Gd material under 5T is found in the relative cooling power values of the La<sub>0.51</sub>Sr<sub>0.49</sub>MnO<sub>3</sub> sample, which range from 62 to 387 J/kg when the applied magnetic field is changed from 1T to 5T. In maintaining with the mean-field theory, the critical exponents were determined to be (β = 0.541 and γ = 0.991 for Dy0.00), (β = 0.559 and γ = 0.954 for Dy0.045), and (β = 0.570 and γ = 1.103 for Dy0.09). Dysprosium doping does not alter the universality class, indicating that the material's fundamental behavior remains unaffected. This nanomaterial has a reasonably strong magnetocaloric response and is inexpensive, making it a possible material for active magnetic refrigerators.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100069"},"PeriodicalIF":0.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work, we examined the structural, impedance, electro-strain, magnetic properties of Er3+/BiFeO3 nanocatlyst prepared via solid state route. The XRD (X-ray Diffraction) pattern reveals that the BFO has a distorted rhombohedral structure (space group R3c) with average domain size was altered from 38.4 nm to 23.7 nm as Er doping increases on the A-site. The morphological and elemental mapping studies were studied by using FeSEM and EDS. The complex impedance and dielectric investigations were conducted at various temperatures in the frequency range 2 MHz to 10 Hz. The dielectric constant (ε') has been observed to significantly decreases as the frequency increases and to rise as temperature increases. A significant peak-to-peak strain (SP and SN) and γs (factor of asymmetry) were recorded in the ranges of 0.89–3.32 %, 0.758–3.124 %, and 15.4–34.3 %, correspondingly, with the highest strain memory value (Sme%) 0.362. The doping of Er3+ ions resulted in an extensive augment in saturation polarization (Ps) from 0.781 to 1.884 μC/cm2 and saturation magnetization (Ms) from 0.764 to 3.27 emu/gm, as examined via the P-E hysteresis and M-H hysteresis loops, respectively. Band gap engineering and improved surface reactivity with Er doping led to an improvement in photo-catalytic degradation efficiencies from 64.8 % to 81.4 %.
{"title":"Electric field driven strain and multiferroic properties of Er3+/BiFeO3 nano-catalyst","authors":"Monika , Praveen Kumar , Varun Sangwan , Amarjeet , Mahendra , Abhishek Saxena , Shakshi Chauhan","doi":"10.1016/j.nwnano.2024.100068","DOIUrl":"10.1016/j.nwnano.2024.100068","url":null,"abstract":"<div><div>In this work, we examined the structural, impedance, electro-strain, magnetic properties of Er<sup>3+</sup>/BiFeO<sub>3</sub> nanocatlyst prepared via solid state route. The XRD (X-ray Diffraction) pattern reveals that the BFO has a distorted rhombohedral structure (space group R3c) with average domain size was altered from 38.4 nm to 23.7 nm as Er doping increases on the A-site. The morphological and elemental mapping studies were studied by using FeSEM and EDS. The complex impedance and dielectric investigations were conducted at various temperatures in the frequency range 2 MHz to 10 Hz. The dielectric constant (ε') has been observed to significantly decreases as the frequency increases and to rise as temperature increases. A significant peak-to-peak strain (S<sup>P</sup> and S<sup>N</sup>) and γ<sub>s</sub> (factor of asymmetry) were recorded in the ranges of 0.89–3.32 %, 0.758–3.124 %, and 15.4–34.3 %, correspondingly, with the highest strain memory value (Sm<sub>e</sub>%) 0.362. The doping of Er<sup>3+</sup> ions resulted in an extensive augment in saturation polarization (P<sub>s</sub>) from 0.781 to 1.884 μC/cm<sup>2</sup> and saturation magnetization (M<sub>s</sub>) from 0.764 to 3.27 emu/gm, as examined via the P-E hysteresis and M-H hysteresis loops, respectively. Band gap engineering and improved surface reactivity with Er doping led to an improvement in photo-catalytic degradation efficiencies from 64.8 % to 81.4 %.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100068"},"PeriodicalIF":0.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Taking into account the unique characteristics of MnO2 (manganese oxide) nanoparticles and their exceptional physicochemical properties, which make them useful in energy storage devices like supercapacitors, this article has focused the synthesis and characterizations of MWCNT/MnO2 nanocomposites with different wt. % of MWCNTs. In the present article, the hydrothermal method was used to create MWCNT/MnO2 nanocomposites. The information regarding structure, Raman bands, functional groups, optical bandgap, and surface characteristics was obtained using an XRD tool, a Raman spectrometer, an FTIR spectrometer, a UV–Vis-NIR spectrometer, and a FE-SEM with EDX, in that order. Moreover, the electrochemical characteristics have been examined using galvanic charge-discharge (GCD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Using XRD, the structural characteristics were retrieved and rejected the possibility of any secondary phases with the determined crystallite size of 22 nm for 1wt.% MWCNT/MnO2 nanocomposite. Additionally, the material underwent Raman tests indicating all the vibrational modes of MWCNT/MnO2 nanocomposite including -COOH, -OH, -C-O, -C=C and Mn-O respectively. From CV, the specific capacitance was found highest for 1wt.% MWCNT/MnO2 nanocomposite ∼729.8F/g at 5mV/s scan rate and from GCD graph it was ∼ 405.5 F/g. EIS spectra confirmed Rs and Rct values for 1wt.% MWCNT/MnO2 nanocomposite ∼ 5.57Ω and 15.60Ω, respectively. Thus, keeping in view the above results, the MnO2/CNT nanocomposites can be utilized as an anode material for energy storage applications.
{"title":"Synthesis and characterizations of MnO2/CNT nanocomposite for usage as electrodes in high-performance supercapacitor","authors":"Garima Srivastava , Ravina , Saurabh Dalela , Nitin Kumar Gautam , Shalendra Kumar , S.Z. Hashmi , M. Ayaz Ahmad , A.M. Quraishi , Virat Khanna , P.A. Alvi","doi":"10.1016/j.nwnano.2024.100067","DOIUrl":"10.1016/j.nwnano.2024.100067","url":null,"abstract":"<div><div>Taking into account the unique characteristics of MnO<sub>2</sub> (manganese oxide) nanoparticles and their exceptional physicochemical properties, which make them useful in energy storage devices like supercapacitors, this article has focused the synthesis and characterizations of MWCNT/MnO<sub>2</sub> nanocomposites with different wt. % of MWCNTs. In the present article, the hydrothermal method was used to create MWCNT/MnO<sub>2</sub> nanocomposites. The information regarding structure, Raman bands, functional groups, optical bandgap, and surface characteristics was obtained using an XRD tool, a Raman spectrometer, an FTIR spectrometer, a UV–Vis-NIR spectrometer, and a FE-SEM with EDX, in that order. Moreover, the electrochemical characteristics have been examined using galvanic charge-discharge (GCD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Using XRD, the structural characteristics were retrieved and rejected the possibility of any secondary phases with the determined crystallite size of 22 nm for 1wt.% MWCNT/MnO<sub>2</sub> nanocomposite. Additionally, the material underwent Raman tests indicating all the vibrational modes of MWCNT/MnO<sub>2</sub> nanocomposite including -COOH, -OH, -C-O, -C=C and Mn-O respectively. From CV, the specific capacitance was found highest for 1wt.% MWCNT/MnO<sub>2</sub> nanocomposite ∼729.8F/g at 5mV/s scan rate and from GCD graph it was ∼ 405.5 F/g. EIS spectra confirmed R<sub>s</sub> and R<sub>ct</sub> values for 1wt.% MWCNT/MnO<sub>2</sub> nanocomposite ∼ 5.57Ω and 15.60Ω, respectively. Thus, keeping in view the above results, the MnO<sub>2</sub>/CNT nanocomposites can be utilized as an anode material for energy storage applications.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100067"},"PeriodicalIF":0.0,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-05DOI: 10.1016/j.nwnano.2024.100065
Yu-Liang Hsiao , Yen-Ting Chen , Chuan-Pu Liu
This study explores the phenomenon of asymmetrical piezoelectric output in Polyvinylidene Fluoride-Trifluoroethylene (PVDF-TrFE) based piezoelectric nanogenerators (PENGs), which have significant implications for improving the efficiency of energy harvesting devices, particularly in charging advanced energy storage applications. By leveraging the viscoelastic properties of PVDF-TrFE, we demonstrate pronounced asymmetry in piezoelectric output when the force frequency surpasses the polymer's natural recovery time, explicitly using an applied force of 60 N at frequencies ranging from 0.3 Hz to 1.25 Hz. These finding sheds light on the dynamic behavior of piezoelectric polymers under high-frequency stimuli and opens avenues for designing advanced energy harvesting devices.
{"title":"Tailoring asymmetrical piezoelectric responses in PVDF-TrFE composites for advanced energy storage applications","authors":"Yu-Liang Hsiao , Yen-Ting Chen , Chuan-Pu Liu","doi":"10.1016/j.nwnano.2024.100065","DOIUrl":"10.1016/j.nwnano.2024.100065","url":null,"abstract":"<div><div>This study explores the phenomenon of asymmetrical piezoelectric output in Polyvinylidene Fluoride-Trifluoroethylene (PVDF-TrFE) based piezoelectric nanogenerators (PENGs), which have significant implications for improving the efficiency of energy harvesting devices, particularly in charging advanced energy storage applications. By leveraging the viscoelastic properties of PVDF-TrFE, we demonstrate pronounced asymmetry in piezoelectric output when the force frequency surpasses the polymer's natural recovery time, explicitly using an applied force of 60 N at frequencies ranging from 0.3 Hz to 1.25 Hz. These finding sheds light on the dynamic behavior of piezoelectric polymers under high-frequency stimuli and opens avenues for designing advanced energy harvesting devices.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100065"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143101410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-05DOI: 10.1016/j.nwnano.2024.100066
Manuel Manrique , Vincent Consonni , Gustavo Ardila , Aymen Ghouma , Gwenaël Le Rhun , Bassem Salem
Piezoelectric nanogenerators (PNGs) based on ZnO nanowires embedded in a polymer matrix have shown great promise in converting ambient mechanical energy into electrical energy, positioning them as candidates for autonomous sensor applications. Here, we fabricate vertically integrated ZnO NW/parylene-C composite-based PNGs using a capacitive configuration. By carefully controlling the thickness of the parylene-C top layer over ZnO nanowire arrays, four PNGs with parylene-C top layer thicknesses ranging from 1.1 to 3.2 µm were successfully fabricated. Raman spectroscopy suggests that the parylene-C does not affect the crystallographic properties of ZnO nanowires when coated. In addition, electrical impedance measurements reveal that increasing the parylene-C top layer thickness decreases the PNG capacitance, leading to higher internal impedance. The performance of these PNGs is assessed through piezoelectric characterizations across a range of load resistances, from 50 kΩ to 122 MΩ, under vertical compression forces of 1 N applied at 0.2 Hz. These tests have identified an optimal parylene-C top layer thickness of around 2 µm, resulting in an instantaneous power density of 1.8 µW/cm3 generated by the PNG. These findings highlight promising pathways for enhancing the efficiency and performance of PNGs.
{"title":"Performance optimization of ZnO nanowire/parylene-C composite-based piezoelectric nanogenerators","authors":"Manuel Manrique , Vincent Consonni , Gustavo Ardila , Aymen Ghouma , Gwenaël Le Rhun , Bassem Salem","doi":"10.1016/j.nwnano.2024.100066","DOIUrl":"10.1016/j.nwnano.2024.100066","url":null,"abstract":"<div><div>Piezoelectric nanogenerators (PNGs) based on ZnO nanowires embedded in a polymer matrix have shown great promise in converting ambient mechanical energy into electrical energy, positioning them as candidates for autonomous sensor applications. Here, we fabricate vertically integrated ZnO NW/parylene-C composite-based PNGs using a capacitive configuration. By carefully controlling the thickness of the parylene-C top layer over ZnO nanowire arrays, four PNGs with parylene-C top layer thicknesses ranging from 1.1 to 3.2 µm were successfully fabricated. Raman spectroscopy suggests that the parylene-C does not affect the crystallographic properties of ZnO nanowires when coated. In addition, electrical impedance measurements reveal that increasing the parylene-C top layer thickness decreases the PNG capacitance, leading to higher internal impedance. The performance of these PNGs is assessed through piezoelectric characterizations across a range of load resistances, from 50 kΩ to 122 MΩ, under vertical compression forces of 1 N applied at 0.2 Hz. These tests have identified an optimal parylene-C top layer thickness of around 2 µm, resulting in an instantaneous power density of 1.8 µW/cm<sup>3</sup> generated by the PNG. These findings highlight promising pathways for enhancing the efficiency and performance of PNGs.</div></div>","PeriodicalId":100942,"journal":{"name":"Nano Trends","volume":"9 ","pages":"Article 100066"},"PeriodicalIF":0.0,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143097188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.nwnano.2024.100062
Xiang Li , Zhong Lin Wang , Di Wei
The world is grappling with dual crises of energy depletion and environmental degradation, as escalating global energy demands strain the sustainability of existing systems. While traditional energy harvesting technologies such as wind, solar, and hydropower have progressed, challenges in energy storage and system stability persist, underscoring the urgent need for more efficient and sustainable alternatives. Emerging water-based energy harvesting technologies that harness the dynamic regulation of electrical double layers (EDLs) at solid-liquid interfaces offer significant advantages, including enhanced energy conversion efficiency and flexible application potential. These systems are particularly well-suited to meet the growing demand for distributed energy in the Internet of Things (IoT), where adaptable and scalable energy solutions are essential. Key nanogenerator technologies utilizing dynamic EDL regulation are classified into five major types: solid-liquid triboelectric nanogenerators (S-L TENGs), triboiontronic nanogenerators (TINGs), hydrovoltaic technology, moisture-enabled electric generators (MEGs), and osmotic power sources. This review provides a comprehensive analysis of their operating principles, output characteristics, and typical applications. Furthermore, it addresses the main challenges and bottlenecks these technologies face and outlines future research and development opportunities, advancing the field of water-based energy harvesting.
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