OBTAINING AND APPLICATION IN IMMUNOANALYTIC SYSTEMS OF GOLD NANOPARTICLES WITH BRANCHED MORPHOLOGY ("NANOFLOWERS")

2020 ◽  
pp. 173-174
Author(s):  
A. Petrakova ◽  
N. Byzova ◽  
A. Zherdev ◽  
B. Dzantiev
Keyword(s):  
Gold Nanoparticles ◽  
Synthesis Methods ◽  
Spherical Nanoparticles ◽  
Two Stage ◽  
Stage Synthesis

Preparations of gold nanoparticles of branched morphology, "nanoflowers", and their conjugates with antibodies were obtained by two-stage synthesis methods. The application of "nanoflowers" in immunochromatographic analysis is considered, their comparison with the traditionally used spherical nanoparticles is carried out; the advantages of "nanoflowers" are characterized.

Temperature-programmed nitridation of monodispersed VOx nanoparticles into nanocrystalline superconducting oxygen-doped vanadium nitride

2021 ◽  
Author(s):  
Khemchand Dewangan ◽  
Dadan Singh ◽  
Sandeep Kumar Singh Patel ◽  
Kamlesh Kumar Shrivas
Keyword(s):  
Thermal Decomposition ◽  
Synthesis Process ◽  
Vanadium Nitride ◽  
High Quality ◽  
Two Stage ◽  
Stage Synthesis ◽  
Temperature Programmed ◽  
Superconducting Applications

A two-stage synthesis process was employed to prepare high-quality nanocrystalline vanadium nitride (VN) for superconducting applications. Firstly, monodispersed amorphous VOx nanoparticles were obtained via thermal-decomposition of vanadium (III) acetylacetonate [V(acac)3]...

scholarly journals Modification of Aerosol Gold Nanoparticles by Nanosecond Pulsed-Periodic Laser Radiation

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2701
Author(s):  
Kirill Khabarov ◽  
Messan Nouraldeen ◽  
Sergei Tichonov ◽  
Anna Lizunova ◽  
Alexey Efimov ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Laser Radiation ◽  
Gas Flow ◽  
Laser Pulses ◽  
Radiation Absorption ◽  
Sintering Process ◽  
Spherical Nanoparticles ◽  
Shrinkage Curve ◽  
Size Modification ◽  
Pulse Energies

This study investigates the processes of interaction of nanosecond pulsed-periodic laser radiation with the flow of aerosol agglomerates of gold nanoparticles synthesized in a spark discharge. Nanoparticles in a gas flow are spatially separated nano-objects whose interaction with each other and with the walls of an experimental cell was insignificant. Therefore, the energy absorbed by nanoparticles was used only for their own heating with further shape and size modification and on heat transfer to the surrounding gas. In the research, we used laser radiation with wavelengths of 527 and 1053 nm at pulse energies up to 900 µJ and pulse repetition rates up to 500 Hz. The dynamics of changes in the nanoparticles size during their sintering process depending on the laser pulses energy is characterized by an S-shaped shrinkage curve. Complete sintering of the initial agglomerates with their transformation into spherical nanoparticles is achieved by a series of impacting laser pulses. The result of nanoparticles’ laser modification is largely determined by the pulse energy and the efficiency of the nanoparticles’ radiation absorption.

A novel two-stage synthesis for 3C–SiC nanowires by carbothermic reduction and their photoluminescence properties

2019 ◽  
Vol 54 (19) ◽  
pp. 12450-12462 ◽  
Author(s):  
Zhouzhou Shen ◽  
Junhong Chen ◽  
Bin Li ◽  
Guangqi Li ◽  
Jingwei Li ◽  
...  
Keyword(s):  
Carbothermic Reduction ◽  
Photoluminescence Properties ◽  
Two Stage ◽  
Sic Nanowires ◽  
Stage Synthesis

Borohydride reduction of AgNO3 in polyacrylate aqueous solutions: Two-stage synthesis of “blue silver”

2005 ◽  
Vol 67 (2) ◽  
pp. 213-216 ◽  
Author(s):  
B. M. Sergeev ◽  
L. I. Lopatina ◽  
A. N. Prusov ◽  
G. B. Sergeev
Keyword(s):  
Aqueous Solutions ◽  
Borohydride Reduction ◽  
Two Stage ◽  
Stage Synthesis

Two-stage synthesis of ultrafine powder of chromium carbide

2018 ◽  
Vol 109 (1) ◽  
pp. 83-86
Author(s):  
Irina Nikolaenko ◽  
Svetlana Antipina ◽  
Gennadii Shveikin
Keyword(s):  
Chromium Carbide ◽  
Ultrafine Powder ◽  
Two Stage ◽  
Stage Synthesis

ChemInform Abstract: TWO-STAGE SYNTHESIS OF AROYLENEBENZIMIDAZOLES

1978 ◽  
Vol 9 (29) ◽  
Author(s):  
V. V. KORSHAK ◽  
G. L. BERESTNEVA ◽  
YU. E. DOROSHENKO ◽  
L. V. POSTNIKOVA ◽  
V. A. KHOMUTOV
Keyword(s):  
Two Stage ◽  
Stage Synthesis

scholarly journals A Nanomaterials Discovery Robot for the Darwinian Evolution of Shape Programmable Gold Nanoparticles

2019 ◽  
Author(s):  
Graham Keenan ◽  
Daniel Salley ◽  
Sergio Martin ◽  
Jonathan Grizou ◽  
Abhishek Sharma ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Electronic Properties ◽  
Darwinian Evolution ◽  
Trial And Error ◽  
Spherical Nanoparticles ◽  
Robotic Platform ◽  
Top Down ◽  
Bottom Up ◽  
Light Emitting ◽  
Dna Mutations

<p><b>The fabrication of nanomaterials from the top-down gives precise structures but it is costly, whereas bottom-up assembly methods are found by trial and error. Nature evolves materials discovery by refining and transmitting the blueprints using DNA mutations autonomously. Genetically inspired optimisation has been used in a range of applications, from catalysis to light emitting materials, but these are not autonomous, and do not use physical mutations. Here we present an autonomously driven materials-evolution robotic platform that allows us to reliably discover the conditions to produce gold-nanoparticles that can run for many cycles, discovering entirely new systems using the opto-electronic properties as a driver. Not only can we reliably discover a method, encoded digitally to synthesise these materials, we can seed in materials from preceding generations to engineer more sophisticated architectures. Over three cycles of evolution we show the seeds from each generation can produce spherical nanoparticles, rods, and highly anisotropic arrow-faceted nanoparticles. </b></p>

scholarly journals Targeted Chemotherapy Delivery via Gold Nanoparticles: A Scoping Review of In Vivo Studies

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1169
Author(s):  
Ștefan Morărașu ◽  
Ștefan Iacob ◽  
Ionuț Tudorancea ◽  
Sorinel Luncă ◽  
Mihail-Gabriel Dimofte
Keyword(s):  
Gold Nanoparticles ◽  
Cancer Treatment ◽  
Chemical Properties ◽  
In Vivo Studies ◽  
Synthesis Methods ◽  
Experimental Cancer ◽  
Therapy Option ◽  
Physical And Chemical ◽  
System Toxicity

In the field of oncology, a lot of improvements in nanotechnology creates support for better diagnosis and therapeutic opportunities, and due to their physical and chemical properties, gold nanoparticles are highly applicable. We performed a literature review on the studies engaging the usage of gold nanoparticles on murine models with a focus on the type of the carrier, the chemotherapy drug, the target tumoral tissue and outcomes. We identified fifteen studies that fulfilled our search criteria, in which we analyzed the synthesis methods, the most used chemotherapy conjugates of gold nanoparticles in experimental cancer treatment, as well as the improved impact on tumor size and system toxicity. Due to their intrinsic traits, we conclude that chemotherapy conjugates of gold nanoparticles are promising in experimental cancer treatment and may prove to be a safer and improved therapy option than current alternatives.

scholarly journals Двухэтапный синтез структурированных микросистем из наностержней оксида цинка с использованием ультразвукового спрей-пиролиза и низкотемпературного гидротермального метода

2020 ◽  
Vol 54 (11) ◽  
pp. 1251
Author(s):  
А.А. Рябко ◽  
А.И. Максимов ◽  
В.Н. Вербицкий ◽  
В.С. Левицкий ◽  
В.А. Мошников ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Surface Defects ◽  
Narrow Band ◽  
Ultrasonic Spray Pyrolysis ◽  
Zinc Oxide Nanorods ◽  
Two Stage ◽  
Ultrasonic Spray ◽  
Oxide Nanorods ◽  
Light Filters ◽  
Stage Synthesis

The features of a two-stage synthesis of structured microsystems based on zinc oxide nanorods using ultrasonic spray pyrolysis and a low-temperature hydrothermal method with suppression of nucleation in the bulk of the solution are presented. It is shown that the use of two-stage synthesis provides control over the size and aspect ratio of nanorods. It is proposed to control the concentration of intrinsic surface defects by measuring the photocurrent with irradiation through narrow-band interference light filters.

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