Crystallization of Gd2 O3 nanoparticles: evolution of the microstructure via electron-beam manipulation

Nanoscale
He LiJing Ju

Abstract

NaGdF4 is one of the most commonly employed phosphor host matrices for lanthanide doping and is one of the most efficient infrared-to-visible up-conversion fluorescent host materials. Although the structure, morphology and luminescence properties of NaREF4 have been sufficiently investigated, there are very few reported instances of introducing localized order/crystallinity by electron-beam (e-beam) irradiation. In this work, we studied the phase transformation of Gd2O3 from an amorphous to crystalline form via manipulation by e-beam irradiation. The amorphous Gd2O3 occurs as an impurity in the cubic-NaGdF4 nanoparticles (NPs). The structural evolutions, including the transformation from amorphous to crystalline, the recrystallization process and the formation of the graphene@NP core-shell structure, are discussed in detail. We also propose an evolution scheme, in which the e-beam manipulation of the organic-containing NPs induces a subtle structural transformation, depending in principle on the microenvironment of the NPs.

References

May 11, 2006·Journal of the American Chemical Society·Hao-Xin MaiChun-Hua Yan
Jun 10, 2008·Nano Letters·Ziyang HuoPeidong Yang
Mar 28, 2009·Science·Caglar O GiritA Zettl
Mar 18, 2010·Chemical Communications : Chem Comm·Weiping QinKezhi Zheng
Mar 26, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Maria AhrénKajsa Uvdal
Sep 8, 2010·Nanoscale·John-Christopher Boyer, Frank C J M van Veggel
Sep 29, 2012·Beilstein Journal of Nanotechnology·Michael HuthGeorg Fantner
Dec 4, 2013·Chemical Communications : Chem Comm·Parthiban Ramasamy, Jinkwon Kim
Apr 22, 2014·Nature Nanotechnology·Yung-Chang LinKazu Suenaga
Jul 2, 2014·Angewandte Chemie·Zhiqing YangMatthew F Chisholm
Jan 20, 2015·Nature Nanotechnology·Renren DengXiaogang Liu
Jan 30, 2016·Advanced Materials·Paloma Rodríguez-SevillaDaniel Jaque
Sep 15, 2017·Beilstein Journal of Nanotechnology·Dovile Baziulyte-PaulavicieneRicardas Rotomskis
Jan 5, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Junfeng YangLianchun Zou

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

Methods Mentioned

BETA
transmission
electron diffraction
X-ray
differential scanning calorimetry

Software Mentioned

Lego

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.