TY  - CONF
AU  - Radulović, Katarina
AU  - Radovanović, Filip
AU  - Ranđelović, Danijela
AU  - Jović, Vesna
AU  - Lamovec, Jelena
AU  - Vasiljević Radović, Dana
AU  - Jakšić, Zoran
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/787
AB  - Properties of sintered NdFeB magnets strongly depend on granulation and size distribution of constituent particles, which requires an efficient method for their separation into relatively narrow size fractions. We investigated two methods of magnetic particle separation from a mixture with different sizes using simulation by finite element method: magnetophoresis and gravity settling. In the case of magnetophoresis magnetic particles ranging in diameter from 1 to 10 m were deflected from the direction of continuous laminar flow by a perpendicular magnetic field. Larger particles were deflected from the direction of laminar flow more than smaller particles. The applied flow rate and strength and gradient of the applied magnetic field were the key parameters in controlling the deflection. The gravity settling model simulated spherical particles falling in heptane. Particles of various sizes were divided according to the time they needed to reach the bottom. The model used an axially symmetric fluid-flow simulation in a moving coordinate system connected with the particle, coupled with an ordinary differential equation for the force balance of the particle (gravity and drag force). The grain accelerated from standstill and rapidly reached its terminal velocity. This velocity was approximately proportional to the square of the particle radius, which led to clear separation of 5-10 um particles from those with a diameter of 1 um.
PB  - Belgrade : ETRAN Society
C3  - 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings
T1  - Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling
UR  - https://hdl.handle.net/21.15107/rcub_dais_787
ER  - 

@conference{
author = "Radulović, Katarina and Radovanović, Filip and Ranđelović, Danijela and Jović, Vesna and Lamovec, Jelena and Vasiljević Radović, Dana and Jakšić, Zoran",
year = "2015",
abstract = "Properties of sintered NdFeB magnets strongly depend on granulation and size distribution of constituent particles, which requires an efficient method for their separation into relatively narrow size fractions. We investigated two methods of magnetic particle separation from a mixture with different sizes using simulation by finite element method: magnetophoresis and gravity settling. In the case of magnetophoresis magnetic particles ranging in diameter from 1 to 10 m were deflected from the direction of continuous laminar flow by a perpendicular magnetic field. Larger particles were deflected from the direction of laminar flow more than smaller particles. The applied flow rate and strength and gradient of the applied magnetic field were the key parameters in controlling the deflection. The gravity settling model simulated spherical particles falling in heptane. Particles of various sizes were divided according to the time they needed to reach the bottom. The model used an axially symmetric fluid-flow simulation in a moving coordinate system connected with the particle, coupled with an ordinary differential equation for the force balance of the particle (gravity and drag force). The grain accelerated from standstill and rapidly reached its terminal velocity. This velocity was approximately proportional to the square of the particle radius, which led to clear separation of 5-10 um particles from those with a diameter of 1 um.",
publisher = "Belgrade : ETRAN Society",
journal = "59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings",
title = "Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling",
url = "https://hdl.handle.net/21.15107/rcub_dais_787"
}

Radulović, K., Radovanović, F., Ranđelović, D., Jović, V., Lamovec, J., Vasiljević Radović, D.,& Jakšić, Z.. (2015). Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling. in 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings
Belgrade : ETRAN Society..
https://hdl.handle.net/21.15107/rcub_dais_787

Radulović K, Radovanović F, Ranđelović D, Jović V, Lamovec J, Vasiljević Radović D, Jakšić Z. Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling. in 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings. 2015;.
https://hdl.handle.net/21.15107/rcub_dais_787 .

Radulović, Katarina, Radovanović, Filip, Ranđelović, Danijela, Jović, Vesna, Lamovec, Jelena, Vasiljević Radović, Dana, Jakšić, Zoran, "Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling" in 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings (2015),
https://hdl.handle.net/21.15107/rcub_dais_787 .

TY  - CONF
AU  - Lamovec, Jelena
AU  - Jović, Vesna
AU  - Radovanović, Filip
AU  - Ranđelović, Danijela
AU  - Radulović, Katarina
AU  - Jakšić, Zoran
AU  - Vasiljević Radović, Dana
PY  - 2015
UR  - https://dais.sanu.ac.rs/123456789/804
AB  - Improved permanent magnets are essential for emergent applications in electronic and electric devices. Different attempts have been made to produce nanoscale anisotropic rare-earth magnetic powder based on Nd-Fe-B material. Recently, high energy surfactant assisted ball milling has been proven to be an effective technique to produce anisotropic hard magnetic Nd-Fe-B nanoparticles. In this paper we are presenting our experimental results on high energy ball milling in planetary mill "Puverisette 7 premium line" from "Fritsch". Except milling material, there are several variables which influence the milling process for the selected mill type. They are: mechanical properties of the milling media material (bowls, balls, etc.), ball-to-powder ratio (BPR), extent of filling of the milling bowl, milling atmosphere, milling speed and duration, and type of solution and surfactant for wet milling. We are going to give influence of all these parameters on obtained NdFeB magnetic materials with nanosized dimensions starting from Nd2Fe14B HDD (Hydrogenated Disproportionated Desorbed) material. 

Acknowledgements: This work is funded by FP7 project MAG-DRIVE: "New permanent magnets for electric-vehicle drive applications", grant agreement no: 605348.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Seventeenth Annual Conference YUCOMAT 2015, Aug 31-Sep 04, 2015, Herceg Novi, Montenegro, Programme and the Book of Abstracts
T1  - Preparation of NdFeB Magnetic Nanoparticles by Surfactant-Assisted High Energy Ball Milling
SP  - 66
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_dais_804
ER  - 

@conference{
author = "Lamovec, Jelena and Jović, Vesna and Radovanović, Filip and Ranđelović, Danijela and Radulović, Katarina and Jakšić, Zoran and Vasiljević Radović, Dana",
year = "2015",
abstract = "Improved permanent magnets are essential for emergent applications in electronic and electric devices. Different attempts have been made to produce nanoscale anisotropic rare-earth magnetic powder based on Nd-Fe-B material. Recently, high energy surfactant assisted ball milling has been proven to be an effective technique to produce anisotropic hard magnetic Nd-Fe-B nanoparticles. In this paper we are presenting our experimental results on high energy ball milling in planetary mill "Puverisette 7 premium line" from "Fritsch". Except milling material, there are several variables which influence the milling process for the selected mill type. They are: mechanical properties of the milling media material (bowls, balls, etc.), ball-to-powder ratio (BPR), extent of filling of the milling bowl, milling atmosphere, milling speed and duration, and type of solution and surfactant for wet milling. We are going to give influence of all these parameters on obtained NdFeB magnetic materials with nanosized dimensions starting from Nd2Fe14B HDD (Hydrogenated Disproportionated Desorbed) material. 

Acknowledgements: This work is funded by FP7 project MAG-DRIVE: "New permanent magnets for electric-vehicle drive applications", grant agreement no: 605348.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Seventeenth Annual Conference YUCOMAT 2015, Aug 31-Sep 04, 2015, Herceg Novi, Montenegro, Programme and the Book of Abstracts",
title = "Preparation of NdFeB Magnetic Nanoparticles by Surfactant-Assisted High Energy Ball Milling",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_dais_804"
}

Lamovec, J., Jović, V., Radovanović, F., Ranđelović, D., Radulović, K., Jakšić, Z.,& Vasiljević Radović, D.. (2015). Preparation of NdFeB Magnetic Nanoparticles by Surfactant-Assisted High Energy Ball Milling. in Seventeenth Annual Conference YUCOMAT 2015, Aug 31-Sep 04, 2015, Herceg Novi, Montenegro, Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 66-66.
https://hdl.handle.net/21.15107/rcub_dais_804

Lamovec J, Jović V, Radovanović F, Ranđelović D, Radulović K, Jakšić Z, Vasiljević Radović D. Preparation of NdFeB Magnetic Nanoparticles by Surfactant-Assisted High Energy Ball Milling. in Seventeenth Annual Conference YUCOMAT 2015, Aug 31-Sep 04, 2015, Herceg Novi, Montenegro, Programme and the Book of Abstracts. 2015;:66-66.
https://hdl.handle.net/21.15107/rcub_dais_804 .

Lamovec, Jelena, Jović, Vesna, Radovanović, Filip, Ranđelović, Danijela, Radulović, Katarina, Jakšić, Zoran, Vasiljević Radović, Dana, "Preparation of NdFeB Magnetic Nanoparticles by Surfactant-Assisted High Energy Ball Milling" in Seventeenth Annual Conference YUCOMAT 2015, Aug 31-Sep 04, 2015, Herceg Novi, Montenegro, Programme and the Book of Abstracts (2015):66-66,
https://hdl.handle.net/21.15107/rcub_dais_804 .

TY  - CONF
AU  - Jović, Vesna
AU  - Đinović, Zoran
AU  - Radovanović, Filip
AU  - Starčević, Marko
AU  - Lamovec, Jelena
AU  - Smiljanić, Milče
AU  - Lazić, Žarko
PY  - 2014
UR  - https://dais.sanu.ac.rs/123456789/785
AB  - In this paper we proposed microfabrication scheme for PDMS (Polydimethylsiloxane) thin membrane fabrication on Si micromachined cavities with square cross section. PDMS network samples for this research were synthesized with the same composition, which are Sylgard 184 (Dow Corning, USA) silicone elastomer base and silicone elastomer curing agent, volume ratio 10:1. Mechanical testing of PDMS elastic properties and bond strength between membranes and oxidized Si wafers, were investigated applying pressurized bulge testing In this paper experimentally determined dependence of the PDMS membrane deflection on pressure load for different membrane thicknesses and sizes of square cavities in Si wafers are given. Also, the influence of different types of Si wafer structuring by anisotropic wet chemical etching on membrane bonding strength were considered.
PB  - Belgrade : Military Technical Institute
C3  - 6th International Scientific Conference on Defensive Technologies, OTEH 2014, Belgrade, 09-10 October 2014: Proceedings
T1  - Characterization of PDMS membranes fabricated by bulkmicromachining on silicon wafers
SP  - 674
EP  - 679
UR  - https://hdl.handle.net/21.15107/rcub_dais_785
ER  - 

@conference{
author = "Jović, Vesna and Đinović, Zoran and Radovanović, Filip and Starčević, Marko and Lamovec, Jelena and Smiljanić, Milče and Lazić, Žarko",
year = "2014",
abstract = "In this paper we proposed microfabrication scheme for PDMS (Polydimethylsiloxane) thin membrane fabrication on Si micromachined cavities with square cross section. PDMS network samples for this research were synthesized with the same composition, which are Sylgard 184 (Dow Corning, USA) silicone elastomer base and silicone elastomer curing agent, volume ratio 10:1. Mechanical testing of PDMS elastic properties and bond strength between membranes and oxidized Si wafers, were investigated applying pressurized bulge testing In this paper experimentally determined dependence of the PDMS membrane deflection on pressure load for different membrane thicknesses and sizes of square cavities in Si wafers are given. Also, the influence of different types of Si wafer structuring by anisotropic wet chemical etching on membrane bonding strength were considered.",
publisher = "Belgrade : Military Technical Institute",
journal = "6th International Scientific Conference on Defensive Technologies, OTEH 2014, Belgrade, 09-10 October 2014: Proceedings",
title = "Characterization of PDMS membranes fabricated by bulkmicromachining on silicon wafers",
pages = "674-679",
url = "https://hdl.handle.net/21.15107/rcub_dais_785"
}

Jović, V., Đinović, Z., Radovanović, F., Starčević, M., Lamovec, J., Smiljanić, M.,& Lazić, Ž.. (2014). Characterization of PDMS membranes fabricated by bulkmicromachining on silicon wafers. in 6th International Scientific Conference on Defensive Technologies, OTEH 2014, Belgrade, 09-10 October 2014: Proceedings
Belgrade : Military Technical Institute., 674-679.
https://hdl.handle.net/21.15107/rcub_dais_785

Jović V, Đinović Z, Radovanović F, Starčević M, Lamovec J, Smiljanić M, Lazić Ž. Characterization of PDMS membranes fabricated by bulkmicromachining on silicon wafers. in 6th International Scientific Conference on Defensive Technologies, OTEH 2014, Belgrade, 09-10 October 2014: Proceedings. 2014;:674-679.
https://hdl.handle.net/21.15107/rcub_dais_785 .

Jović, Vesna, Đinović, Zoran, Radovanović, Filip, Starčević, Marko, Lamovec, Jelena, Smiljanić, Milče, Lazić, Žarko, "Characterization of PDMS membranes fabricated by bulkmicromachining on silicon wafers" in 6th International Scientific Conference on Defensive Technologies, OTEH 2014, Belgrade, 09-10 October 2014: Proceedings (2014):674-679,
https://hdl.handle.net/21.15107/rcub_dais_785 .

TY  - JOUR
AU  - Sarajlić, Milija
AU  - Đurić, Zoran G.
AU  - Jović, Vesna
AU  - Petrović, Srđan
AU  - Đorđević, Dragana
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/378
AB  - A novel readout procedure for the determination of detection limit at an adsorption-based mercury sensor is described. The procedure is based on the evaluation of the initial voltage slope in time evolution of adsorbed elementary mercury. The Langmuir time-dependent adsorption theory is utilized to derive it. This procedure gives the theoretical minimum for the detection for this type of the sensor, which is estimated at 180 ng/m3. This is five times lower than the best previously reported results. This procedure can also be used for regular sensor readout. This work describes the experimental procedure for mercury sensor fabrication as well as its measurement cycle. The sensor is working in the cycles of mercury adsorption and evaporation induced by heating. It is shown that every part of the cycle can be monitored by measuring output voltage of the sensor without any additional measurements like surface temperature or rate of the evaporation.
PB  - Elsevier
T2  - Microelectronic Engineering
T1  - Detection Limit for an Adsorption-Based Mercury Sensor
SP  - 118
EP  - 122
VL  - 103
DO  - 10.1016/j.mee.2012.10.009
UR  - https://hdl.handle.net/21.15107/rcub_dais_378
ER  - 

@article{
author = "Sarajlić, Milija and Đurić, Zoran G. and Jović, Vesna and Petrović, Srđan and Đorđević, Dragana",
year = "2013",
abstract = "A novel readout procedure for the determination of detection limit at an adsorption-based mercury sensor is described. The procedure is based on the evaluation of the initial voltage slope in time evolution of adsorbed elementary mercury. The Langmuir time-dependent adsorption theory is utilized to derive it. This procedure gives the theoretical minimum for the detection for this type of the sensor, which is estimated at 180 ng/m3. This is five times lower than the best previously reported results. This procedure can also be used for regular sensor readout. This work describes the experimental procedure for mercury sensor fabrication as well as its measurement cycle. The sensor is working in the cycles of mercury adsorption and evaporation induced by heating. It is shown that every part of the cycle can be monitored by measuring output voltage of the sensor without any additional measurements like surface temperature or rate of the evaporation.",
publisher = "Elsevier",
journal = "Microelectronic Engineering",
title = "Detection Limit for an Adsorption-Based Mercury Sensor",
pages = "118-122",
volume = "103",
doi = "10.1016/j.mee.2012.10.009",
url = "https://hdl.handle.net/21.15107/rcub_dais_378"
}

Sarajlić, M., Đurić, Z. G., Jović, V., Petrović, S.,& Đorđević, D.. (2013). Detection Limit for an Adsorption-Based Mercury Sensor. in Microelectronic Engineering
Elsevier., 103, 118-122.
https://doi.org/10.1016/j.mee.2012.10.009
https://hdl.handle.net/21.15107/rcub_dais_378

Sarajlić M, Đurić ZG, Jović V, Petrović S, Đorđević D. Detection Limit for an Adsorption-Based Mercury Sensor. in Microelectronic Engineering. 2013;103:118-122.
doi:10.1016/j.mee.2012.10.009
https://hdl.handle.net/21.15107/rcub_dais_378 .

Sarajlić, Milija, Đurić, Zoran G., Jović, Vesna, Petrović, Srđan, Đorđević, Dragana, "Detection Limit for an Adsorption-Based Mercury Sensor" in Microelectronic Engineering, 103 (2013):118-122,
https://doi.org/10.1016/j.mee.2012.10.009 .,
https://hdl.handle.net/21.15107/rcub_dais_378 .

TY  - JOUR
AU  - Sarajlić, Milija
AU  - Đurić, Zoran G.
AU  - Jović, Vesna
AU  - Petrović, Srđan
AU  - Đorđević, Dragana
PY  - 2013
UR  - https://dais.sanu.ac.rs/123456789/377
AB  - A novel readout procedure for a mercury sensor has been proposed. The sensor is based on the surface adsorption. Mercury vapor is adsorbed at the surface of a thin gold layer patterned into four meanders which are connected into a Wheatstone bridge configuration. Sensing is achieved by the resistivity change of the gold film during mercury adsorption. Direct output from the sensor is electric voltage. It takes an additional procedure to convert voltage to mercury concentration. This type of sensor is improved by introducing continuous readout procedure for the voltage–concentration conversion. By using this readout procedure it is possible to monitor mercury vapor concentration as a function of time. Readout is based on the Langmuir time–dependent adsorption theory. This paper illustrates a practical implementation of the new readout procedure.
PB  - Springer-Verlag
T2  - Microsystem Technologies
T1  - An adsorption-based mercury sensor with continuous readout
SP  - 749
EP  - 755
VL  - 19
IS  - 5
DO  - 10.1007/s00542-012-1679-6
UR  - https://hdl.handle.net/21.15107/rcub_dais_377
ER  - 

@article{
author = "Sarajlić, Milija and Đurić, Zoran G. and Jović, Vesna and Petrović, Srđan and Đorđević, Dragana",
year = "2013",
abstract = "A novel readout procedure for a mercury sensor has been proposed. The sensor is based on the surface adsorption. Mercury vapor is adsorbed at the surface of a thin gold layer patterned into four meanders which are connected into a Wheatstone bridge configuration. Sensing is achieved by the resistivity change of the gold film during mercury adsorption. Direct output from the sensor is electric voltage. It takes an additional procedure to convert voltage to mercury concentration. This type of sensor is improved by introducing continuous readout procedure for the voltage–concentration conversion. By using this readout procedure it is possible to monitor mercury vapor concentration as a function of time. Readout is based on the Langmuir time–dependent adsorption theory. This paper illustrates a practical implementation of the new readout procedure.",
publisher = "Springer-Verlag",
journal = "Microsystem Technologies",
title = "An adsorption-based mercury sensor with continuous readout",
pages = "749-755",
volume = "19",
number = "5",
doi = "10.1007/s00542-012-1679-6",
url = "https://hdl.handle.net/21.15107/rcub_dais_377"
}

Sarajlić, M., Đurić, Z. G., Jović, V., Petrović, S.,& Đorđević, D.. (2013). An adsorption-based mercury sensor with continuous readout. in Microsystem Technologies
Springer-Verlag., 19(5), 749-755.
https://doi.org/10.1007/s00542-012-1679-6
https://hdl.handle.net/21.15107/rcub_dais_377

Sarajlić M, Đurić ZG, Jović V, Petrović S, Đorđević D. An adsorption-based mercury sensor with continuous readout. in Microsystem Technologies. 2013;19(5):749-755.
doi:10.1007/s00542-012-1679-6
https://hdl.handle.net/21.15107/rcub_dais_377 .

Sarajlić, Milija, Đurić, Zoran G., Jović, Vesna, Petrović, Srđan, Đorđević, Dragana, "An adsorption-based mercury sensor with continuous readout" in Microsystem Technologies, 19, no. 5 (2013):749-755,
https://doi.org/10.1007/s00542-012-1679-6 .,
https://hdl.handle.net/21.15107/rcub_dais_377 .