Papers by Ngo Thi Mai Huong
Harm reduction journal, Jan 30, 2015
Although a growing body of evidence suggests that low dead space syringes may reduce the risk of ... more Although a growing body of evidence suggests that low dead space syringes may reduce the risk of human immunodeficiency virus (HIV) and Hepatitis C virus infection associated with sharing syringes among people who inject drugs, there is little evidence of effective approaches to motivate people who inject drugs (PWID) to shift from high to low dead space syringes. Using a mix of consumer and trade marketing approaches, informed by rapid assessments of both the syringe market and PWID preferences, practices, and behaviors in Hanoi and Ho Chi Minh City, Population Services International (PSI) Vietnam piloted an intervention to increase the use of low dead space syringes (LDSS) in the three provinces of Hanoi, Ho Chi Minh City, and Thai Nguyen, where an estimated 31 % of PWID are HIV positive and 58 % are living with hepatitis C virus (HCV). This paper provides a summary of the social marketing activities implemented and results achieved by PSI Vietnam during an initial 1-year pilot pe...
Materials Chemistry and Physics, 2011
Scripta Materialia, 2007
Recently, it has been reported that the family of skutterudite compounds has great practical pote... more Recently, it has been reported that the family of skutterudite compounds has great practical potential for thermoelectric applications in the moderate temperature range [1] and [2]. The skutterudite compounds MX 3 (M = Co, Rh or Ir; X = P, As or Sb) have the CoAs 3 -type cubic structure ...
Physical Review B, 2005
In order to answer the question of whether there is another source of magnetism that plays an imp... more In order to answer the question of whether there is another source of magnetism that plays an important role in tuning ferromagnetism in diluted magnetic oxide thin films, investigations on magnetic and structural properties of some types of transition-metal-doped semiconductors had been done. Results on Cr-doped ZnO and Ni-doped SnO 2 films fabricated under various conditions implied that structural defects and/or oxygen vacancy, indeed, very much influence the magnetism in those systems. An elimination of defects, as well as filling up oxygen vacancies, might cause certain degradation to the ferromagnetic ordering of some specific types of compounds.
Journal of Physics: Condensed Matter, 2005
Transparent Ni-doped SnO2 thin films grown by the pulsed laser deposition technique on LaAlO3, Sr... more Transparent Ni-doped SnO2 thin films grown by the pulsed laser deposition technique on LaAlO3, SrTiO3 as well as R-cut Al2O3 substrates all show room-temperature ferromagnetism (FM). While the Ni-doped SnO2 films on LaAlO3 substrates have a large magnetic moment of about 2 µB/Ni, films grown under the same conditions on SrTiO3 and Al2O3 substrates have a magnetic moment of one
Journal of Physics: Condensed Matter, 2006
Laser ablated transition-metal (TM)-doped In2O3 thin films grown under appropriate conditions on ... more Laser ablated transition-metal (TM)-doped In2O3 thin films grown under appropriate conditions on both MgO and Al2O3 substrates can be well crystallized and ferromagnetic at room temperature. Of all the dopants, Ni seems to be the most promising candidate since doping Ni in In2O3 results in semiconducting films with the largest magnetic moment. Films are cluster-free. Magnetic force microscopy measurements confirm that the magnetic signals at room temperature are real. Moreover, compared to TM:In2O3 films deposited on MgO, films on Al2O3 have smaller grains and those are better connected, so that the film texture is smoother and the magnetic domains are more uniform. The size of ferromagnetic domains is determined to be about 1 µm. The room temperature ferromagnetism in V/Cr/Fe/Co/Ni-doped In2O3 films probably originates from the doped In2O3 matrices.
Journal of Magnetism and Magnetic Materials, 2006
Laser-ablated Co-doped In2O3 thin films were fabricated under various growth conditions on R-cut ... more Laser-ablated Co-doped In2O3 thin films were fabricated under various growth conditions on R-cut Al2O3 and MgO substrates. All Co:In2O3 films are well-crystallized, single phase, and room temperature ferromagnetic. Co atoms were well substituted for In atoms, and their distribution is greatly uniform over the whole thickness of the films. Films grown at 550°C showed the largest magnetic moment of about
Applied Physics Letters, 2005
Ni-doped In 2 O 3 thin films were fabricated by laser ablation on sapphire and MgO substrates und... more Ni-doped In 2 O 3 thin films were fabricated by laser ablation on sapphire and MgO substrates under various conditions. All Ni: In 2 O 3 films are well-crystallized, single phase, and show clear evidences of room temperature ferromagnetism ͑FM͒. Ni atoms were well substituted for In atoms, and distributed very uniformly over the whole thickness of the films. However, the films grown at 550°C have the Ni concentration exactly the same as in the synthesized target, and as the results, they have the best crystallinity and the largest magnetic moment ͑maximum about 0.7 B /Ni͒. The observed FM in this type of wide-band gap semiconductors has proved that by applying appropriate growth conditions, doping few percent of Ni into In 2 O 3 could indeed result in a potential magnetic material.
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Papers by Ngo Thi Mai Huong