ORCID Profile
0000-0003-4876-8257
Current Organisations
Hunan University
,
Iran University of Science and Technology
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Publisher: American Chemical Society (ACS)
Date: 03-01-2019
DOI: 10.1021/JACS.8B12415
Publisher: Wiley
Date: 04-07-2016
Publisher: American Chemical Society (ACS)
Date: 21-04-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR02636C
Abstract: Novel materials from self-assembled nanocrystals hold great promise for applications ranging from inorganic catalysis to bio-imaging.
Publisher: American Chemical Society (ACS)
Date: 16-02-2021
Publisher: Wiley
Date: 20-08-2022
Abstract: Early warning sensors rapidly monitor critical temperatures, humidity, and fires, which are crucial to reduce or avoid natural disasters in complex environments, such as fire or water disasters. Here, a highly sensitive, readable, and dual‐functional sensor is designed for a fast‐response fire alarm and rapid humidity detection based on sustainable biological films (named MSCG films). The MSCG films are composed of grafted sisal nanofibers (MgC), silk nanofibers, graphene, and citric acid (CA). After crosslinking with CA, MSCG films exhibit good wet strength (i.e., 128.8 MPa) after soaking in 100 °C water, thus confirming that the films would be applicable to a broad temperature range in humid environments. After flame ignition, the MSCG films are rapidly carbonized to activate an alarm sound and a light in the circuit with a fire response time as short as 1 s. It exhibits ultrafast temperature response/recovery time (i.e., 0.1 s/0.3 s) and rapid humidity response time (i.e., 0.9 s). The dual‐functional sensor is further assembled into a versatile sensor system for real‐time monitoring of fire accidents and environmental humidity, which can be integrated into consumer electronics, such as portable laptops and mobile phones.
Publisher: Elsevier BV
Date: 2014
Publisher: Springer Science and Business Media LLC
Date: 05-08-2021
Publisher: American Chemical Society (ACS)
Date: 08-09-2020
Publisher: American Chemical Society (ACS)
Date: 23-10-2015
DOI: 10.1021/JACS.5B09337
Publisher: American Chemical Society (ACS)
Date: 31-05-2012
DOI: 10.1021/JP303120D
Publisher: American Chemical Society (ACS)
Date: 14-10-2013
DOI: 10.1021/AM403572K
Abstract: Ultrathin 2D nanostructures have shown many unique properties and are attractive for various potential applications. Here, we demonstrated a strategy to synthesize ultrathin VOx nanosheets. The as-obtained ultrathin VOx nanosheets showed a large Brunauer-Emmett-Teller (BET) surface area of 136.3 m2 g(-1), which is much larger than that of 1D multilayer VOx nanotubes. As a proof of concept, these hydrophilic ultrathin nanosheets were applied in water treatment and exhibited excellent absorption capability to remove Rhodamine B (RhB) in wastewater owing to their large specific surface area, good hydrophilic property, and more negative zeta potential. In addition, this method could be generalized to prepare other 2D nanostructures with great potential for various attractive applications.
Publisher: American Chemical Society (ACS)
Date: 25-11-2020
Publisher: Wiley
Date: 29-11-2013
Abstract: Porous, hollow metal carbonate microstructures show many unique properties, and are attractive for various applications. Herein, we report the first demonstration of a general strategy to synthesize hollow metal carbonate structures, including porous MnCO3 hollow cubics, porous CoCO3 hollow rhombuses and porous CaCO3 hollow capsules. For ex le, the porous, hollow MnCO3 microcubes show larger Brunauer-Emmett-Teller (BET) surface areas of 359.5 m(2) g(-1) , which is much larger than that of solid MnCO3 microcubics (i.e., 12.03 m(2) g(-1) ). As a proof of concept, these porous MnCO3 hollow microcubes were applied to water treatment and exhibited an excellent ability to remove organic pollutants in waste water owing to their hollow structure and large specific surface area.
Publisher: Springer Science and Business Media LLC
Date: 10-06-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR05874E
Abstract: 3D halos were fabricated from co-assembly of Fe 3 O 4 and Au NPs of different sizes and shapes by a bottom-up strategy, creating new opportunities to explore assembled materials with enriched functionalities.
Publisher: Wiley
Date: 13-12-2012
Abstract: Double-wall amorphous FePO4 nanotubes are prepared by an oil-phase chemical route. The inward diffusion of vacancies and outward diffusion of ions through passivation layers result in double-wall nanotubes with thin walls. Such a process can be extended to prepare hollow polydedral nanocrystals and hollow ellipsoids. The double-wall FePO4 nanotubes show interesting cathode performance in Li ion batteries.
Publisher: Wiley
Date: 22-10-2021
Abstract: Shape memory polymers exhibit great potential for applications in aeronautics, astronautics, biomedicine, intelligent robots, and electronics. Based on traditional fabrication methods, as‐prepared shape memory micro‐/nanodevices are brittle with poor deformability. For instance, these devices shatter or crack when they are bent, which greatly limit their practical applications. In particular, there has been little use of shape memory films for high performance sensing devices in electrical circuits. Here, a novel polyvinyl alcohol (PVA) film is fabricated from a mixture of graphene nanosheets (GNs), sisal cellulose microcrystals (CNC), polyamine‐functionalized perylene bisimide derivative (APBI), and PVA through a simple electrospinning technique. These novel PVA films exhibit excellent thermal, mechanical, and shape memory properties. Moreover, after spin‐coating with Ag nanowires, the PVA films show excellent conductivity and flexibility in shape memory recovery cycles, and are used as a flexible sensing device in the circuit.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TB01233G
Abstract: A highly efficient nanozyme system, termed a hollow multipod Cu(OH) 2 superstructure (HMPS), has been developed via direct conversion from irregular nanoparticles.
Publisher: American Chemical Society (ACS)
Date: 28-09-2021
DOI: 10.1021/JACS.1C06652
Abstract: Integrating multifunctional nanostructures capable of radiotherapy and photothermal ablation is an emerging alternative in killing cancer cells. In this work, we report a novel plasmonic heterostructure formed by decorating AuPt nanoparticles (NPs) onto the surfaces of CuS nanosheets (AuPt@CuS NSs) as a highly effective nanotheranostic toward dual-modal photoacoustic/computed tomography imaging and enhanced synergistic radiophotothermal therapy. These heterostructures can confer higher photothermal conversion efficiency via the local electromagnetic enhancement as well as a greater radiation dose deposition in the form of glutathione depletion and reactive oxygen species generation. As a result, the depth of tissue penetration is improved, and hypoxia of the tumor microenvironment is alleviated. With synergistic enhancement in the efficacy of photothermal ablation and radiotherapy, the tumor can be eliminated without later recurrence. It is believed that these multifunctional heterostructures will play a vital role in future oncotherapy with the enhanced synergistic effects of radiotherapy and photothermal ablation under the guided imaging of a potential dual-modality system.
Publisher: American Chemical Society (ACS)
Date: 14-09-2018
Publisher: American Chemical Society (ACS)
Date: 24-01-2013
DOI: 10.1021/AM302877Q
Abstract: A facile thermal decomposing method has been developed for the fabrication of Co(x)P nanostructures with controlled size, phase, and shape (e.g., Co(2)P rod and spheres, CoP hollow and solid particles). An amorphous carbon layer could be introduced by the carbonization of organic surfactants from the precursors. The electrochemical performance of typical CoP and Co(2)P s les as anode materials has been investigated and the CoP hollow nanoparticle with carbon coating layer depicts good capacity retention and high rate capability (e.g., specific capacity of 630 mA h g(-1) at 0.2 C after 100 cycles, and a reversible capacity of 256 mA h g(-1) can be achieved at a high current rate of 5 C).
Location: United States of America
Location: Iran (Islamic Republic of)
Location: Iran (Islamic Republic of)
No related grants have been discovered for Vahid Safarifard.