The rapid size- and shape-controlled continuous hydrothermal synthesis of metal sulphide nanomaterials

Quaternary kesterite Cu2ZnSnS4 (CZTS) nanocrystals (NCs) have been synthesized using a simple, size and shape tunable, and low-cost hydrothermal technique without using toxic chemicals.

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Convenient Molecular Approach of Size and Shape Controlled ZnSe and ZnTe Nanocrystals

MRS Proceedings ◽

10.1557/proc-635-c4.47 ◽

2001 ◽

Vol 635 ◽

Author(s):

Young-wook Jun ◽

Jong-Il Park ◽

Jinwoo Cheon

Keyword(s):

Particle Size ◽

Semiconductor Nanocrystals ◽

Dimensional Sphere ◽

Controlled Synthesis ◽

Molecular Approach ◽

Molecular Precursors ◽

Size And Shape ◽

Wide Range ◽

One Step ◽

Shape Controlled

AbstractOur study describes a convenient one-step synthesis of ZnSe and ZnTe nanocrystals (NC) whose sizes and shapes are precisely tuned by varing the growth temperature or stabilizing surfactants. We utilized molecular precursors, bis(phenylselenolate or phenyltellurolato)zinc -N,N,N',N'-tetramethylethylenediamine (TMEDA), which effectively produce 0-dimensional sphere or 1-dimensional nanorods of ZnSe or ZnTe, respectively. Nanocrystals are highly monodispersed and luminescent; the emission wavelength varies over a wide range depending on the particle size. This study constitutes a nice demonstration of direct size and shape controlled synthesis of semiconductor nanocrystals and this method can be extended to the synthesis of nanocrystals of other materials.

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Hydrothermal synthesis of size- and shape-controlled CaTiO3fine particles and their photocatalytic activity

CrystEngComm ◽

10.1039/c4ce00376d ◽

2014 ◽

Vol 16 (25) ◽

pp. 5591-5597 ◽

Cited By ~ 36

Author(s):

Takeshi Kimijima ◽

Kiyoshi Kanie ◽

Masafumi Nakaya ◽

Atsushi Muramatsu

Keyword(s):

Photocatalytic Activity ◽

Hydrothermal Synthesis ◽

Size And Shape ◽

Shape Controlled

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Theranostic two-dimensional superparamagnetic maghemite quantum structure for ROS-mediated cancer therapy

Journal of Materials Chemistry B ◽

10.1039/d1tb01036k ◽

2021 ◽

Author(s):

Yaser Rehman ◽

Z. X. Cheng ◽

Xiaolin Wang ◽

Xu-Feng Huang ◽

Konstantin Konstantinov

Keyword(s):

Hydrothermal Synthesis ◽

Cancer Therapy ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Two Dimensional ◽

Biological Applications ◽

Quantum Structure ◽

Size And Shape ◽

Shape Controlled

Size and shape-controlled two-dimensional (2D) superparamagnetic maghemite (γ-Fe2O3) quantum flakes (MQF) with high surface area and mesoporosity prepared by facile hydrothermal synthesis and calcination for biological applications. These quantum flakes...

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Continuous-flow hydrothermal synthesis for the production of inorganic nanomaterials

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2015.0015 ◽

2015 ◽

Vol 373 (2057) ◽

pp. 20150015 ◽

Cited By ~ 40

Author(s):

Peter W. Dunne ◽

Alexis S. Munn ◽

Chris L. Starkey ◽

Tom A. Huddle ◽

Ed H. Lester

Keyword(s):

Hydrothermal Synthesis ◽

Metal Oxide ◽

Supercritical Water ◽

Continuous Flow ◽

Shape Control ◽

Metal Oxide Nanoparticles ◽

Careful Consideration ◽

Synthetic Approach ◽

Oxide Systems ◽

Wide Range

As nanotechnology becomes increasingly important and ubiquitous, new and scalable synthetic approaches are needed to meet the growing demand for industrially viable routes to nanomaterial production. Continuous-flow hydrothermal synthesis or supercritical water hydrothermal synthesis (scWHS) is emerging as a versatile solution to this problem. The process was initially developed to take advantage of the tunable chemical and physical properties of superheated water to produce metal oxide nanoparticles by rapid nucleation and precipitation. The development of new mixing regimes and reactor designs has been facilitated by the modelling of reactor systems. These new reactor designs further exploit the properties of supercritical water to promote faster and more uniform mixing of reagent streams. The synthetic approach has been expanded beyond the metal oxide systems for which it was conceived, and now encompasses metal sulfides, metal phosphates, metal nanoparticles and metal–organic frameworks. In many of these cases, some degree of size and shape control can be achieved through careful consideration of both chemistry and reactor design. This review briefly considers the development of scWHS reactor technology, before highlighting some of our recent work in expanding the scope of this synthetic method to include a wide range of materials.

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DNA Enthralled Less Resistive Palladium Nano-Spheres for Effective Hydrogen Evolution Reaction

Catalysis Science & Technology ◽

10.1039/d1cy00986a ◽

2021 ◽

Author(s):

K. Sangeetha ◽

Karthik Kumaran Saravanan ◽

Eunice Evangeline Bariki ◽

Vennala Niharika ◽

Rishivandhiga Jayakumar ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Deoxyribonucleic Acid ◽

Size And Shape ◽

Shape Controlled ◽

Effective Hydrogen

The greener entry of biomolecules in the field of nanomaterials (NMs) synthesis effectively supports to develop various size and shape controlled NMs in numerous applications. In this line, Deoxyribonucleic acid...

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In-Liquid Plasma Process for Size- and Shape-Controlled Synthesis of Silver Nanoparticles by Controlling Gas Bubbles in Water

Materials ◽

10.3390/ma11060891 ◽

2018 ◽

Vol 11 (6) ◽

pp. 891 ◽

Cited By ~ 5

Author(s):

Hyun-Jin Kim ◽

Jun-Goo Shin ◽

Choon-Sang Park ◽

Dae Kum ◽

Bhum Shin ◽

...

Keyword(s):

Silver Nanoparticles ◽

Gas Bubbles ◽

Controlled Synthesis ◽

Plasma Process ◽

Size And Shape ◽

Shape Controlled

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P-type conducting transparent characteristics of delafossite Ca doped CuScO2 prepared by hydrothermal synthesis

Dalton Transactions ◽

10.1039/d1dt00362c ◽

2021 ◽

Author(s):

Han Gao ◽

Xianwei Zeng ◽

Qiang Guo ◽

Zhi Yang ◽

Yanwen Deng ◽

...

Keyword(s):

Hydrothermal Synthesis ◽

Hydrothermal Method ◽

Delafossite Oxides ◽

P Type

Ca doped CuScO2 (CSO) delafossite oxides with 3-4 μm were synthesized through hydrothermal method using Cu(NO3)2•3H2O, Sc(NO3)3•xH2O as precursor at 240 °C for 24 h in this work. The influence...

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Microwave-Assisted vs. Conventional Hydrothermal Synthesis of MoS2 Nanosheets: Application towards Hydrogen Evolution Reaction

Crystals ◽

10.3390/cryst10111040 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1040 ◽

Cited By ~ 1

Author(s):

Getachew Solomon ◽

Raffaello Mazzaro ◽

Vittorio Morandi ◽

Isabella Concina ◽

Alberto Vomiero

Keyword(s):

Hydrothermal Synthesis ◽

Hydrothermal Method ◽

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Current Density ◽

Crystal Morphology ◽

Synthesis Method ◽

Synthesis Methods ◽

Mos2 Nanosheets ◽

Microwave Assisted

Molybdenum sulfide (MoS2) has emerged as a promising catalyst for hydrogen evolution applications. The synthesis method mainly employed is a conventional hydrothermal method. This method requires a longer time compared to other methods such as microwave synthesis methods. There is a lack of comparison of the two synthesis methods in terms of crystal morphology and its electrochemical activities. In this work, MoS2 nanosheets are synthesized using both hydrothermal (HT-MoS2) and advanced microwave methods (MW-MoS2), their crystal morphology, and catalytical efficiency towards hydrogen evolution reaction (HER) were compared. MoS2 nanosheet is obtained using microwave-assisted synthesis in a very short time (30 min) compared to the 24 h hydrothermal synthesis method. Both methods produce thin and aggregated nanosheets. However, the nanosheets synthesized by the microwave method have a less crumpled structure and smoother edges compared to the hydrothermal method. The as-prepared nanosheets are tested and used as a catalyst for hydrogen evolution results in nearly similar electrocatalytic performance. Experimental results showed that: HT-MoS2 displays a current density of 10 mA/cm2 at overpotential (−280 mV) compared to MW-MoS2 which requires −320 mV to produce a similar current density, suggesting that the HT-MoS2 more active towards hydrogen evolutions reaction.

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The plastic deformation of iron and the formation of Neumann lines

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ◽

10.1098/rspa.1925.0070 ◽

1925 ◽

Vol 108 (745) ◽

pp. 231-231

Keyword(s):

Plastic Deformation ◽

Pure Iron ◽

Crystal Surfaces ◽

Size And Shape ◽

Slip Bands ◽

Wide Range ◽

Moderate Rate ◽

Rapid Deformation

The object of the investigation described in the present paper was to ascertain the manner in which wide variations in speed affect the mechanism of deformation in plastic metals. Iron was selected as the first metal for experiment, mainly because it is known that rapid deformation produced by shock is accompanied in this metal by special features, known as Neumann lines or lamellæ. When a piece of nearly pure iron, of suitable size and shape, with one face polished and etched, is subsequently subjected to plastic deformation at a moderate rate, the crystal surfaces, when examined under the microscope after deformation, show the well-known appearance of slip bands (1). The present experiments were undertaken in the first instance to ascertain whether the character, number and appearance of such slip bands would be appreciably affected by varying the rate of deformation over a wide range. For the sake of convenience, deformation by compression has been employed, the metal being used in the form of small rectangular prisms, measuring in some instances 0.44 inch by 0.44 inch in section by 0.7 inch in height.

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