Tag: magnetic

Hot off the press: New paper in Chemical Engineering Journal!

The paper “Mitochondria-targeted magnetic gold nanoheterostructure for multi-modal imaging guided photothermal and photodynamic therapy of triple-negative breast cancer has been published in Chemical Engineering Journal. The paper is co-authored by Anna Roig and a former N&N Group member Siming Yu (now Guangdong Provincial Engineering and Technological Research Center for Drug Carrier Development, Guangzhou).

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Zheng Ma gave a talk at Joint European Magnetic Symposia (JEMS2019)

Zheng Ma, PhD candidate at the N&N Group, attended Joint European Magnetic Symposia (JEMS2019) in Uppsala, Sweden (26-30 August). He gave a talk “Structural and Magnetic Properties of Cr-substituted ε-Fe2O3 Nanoparticles”. It was a collaborative work between our group (supervised by Martí Gich) and  CMEOS group in ICMAB, as well as our colleagues from ALBA synchrotron. 

Good job Ma! 

Hot off the press: published paper on Nanoscale!

The paper entitled “Nanoclusters of crystallographically aligned nanoparticles for magnetic thermotherapy: aqueous ferrofluid, agarose phantoms and ex vivo melanoma tumour assessment” has recently been published on the Nanoscale Journal. We congratulate Anna Roig and our collaborator Marcela Fernández for being authors of this nice study!


Abstract: Magnetic hyperthermia is an oncological therapy where magnetic nanostructures, under a radiofrequency field, act as heat transducers increasing tumour temperature and killing cancerous cells. Nanostructure heating efficiency depends both on the field conditions and on the nanostructure properties and mobility inside the tumour. Such nanostructures are often incorrectly bench-marketed in the colloidal state and using field settings far off from the recommended therapeutic values. Here, we prepared nanoclusters composed of iron oxide magnetite nanoparticles crystallographically aligned and their specific absorption rate (SAR) values were calorimetrically determined in physiological fluids, agarose-gel-phantoms and ex vivo tumours extracted from mice challenged with B16-F0 melanoma cells. A portable, multipurpose applicator using medical field settings; 100 kHz and 9.3 kA m−1, was developed and the results were fully analysed in terms of nanoclusters’ structural and magnetic properties. A careful evaluation of the nanoclusters’ heating capacity in the three milieus clearly indicates that the SAR values of fluid suspensions or agarose-gel-phantoms are not adequate to predict the real tissue temperature increase or the dosage needed to heat a tumour. Our results show that besides nanostructure mobility, perfusion and local thermoregulation, the nanostructure distribution inside the tumour plays a key role in effective heating. A suppression of the magnetic material effective heating efficiency appears in tumour tissue. In fact, dosage had to be increased considerably, from the SAR values predicted from fluid or agarose, to achieve the desired temperature increase. These results represent an important contribution towards the design of more efficient nanostructures and towards the clinical translation of hyperthermia.

Good news! Miquel Torras has secured a Severo Ochoa Grant for his Master’s Research at ICMAB within the N&N Group!


Miquel Torras, Master Student, coursing “MSc. Applied Materials Chemistry” at Universitat de Barcelona, has secured one of the competitive Severo Ochoa Grants to conduct his research at the ICMAB-CSIC, within the N&N Group

Miquel will work on magneto-plasmonic nanostructures, following the work of his Bachelor’s degree, under the supervision of Anna Roig.

We are very happy for him! Congratulations Miquel!

More info about the Severo Ochoa Grant call and resolution: https://sede.csic.gob.es/becas-severo-ochoa-icmab


Miquel Torras is back with us to do his MSc Thesis in magnetic plasmonic nanotriangles

Miquel Torras in the labMiquel Torras, who was in the N&N Group during last semester to do his Degree’s Final Project, is back with us this year. He has started a MSc in Applied Materials Chemistry at Universitat de Barcelona (UB) and will do his MSc Thesis in the group, under the supervision of Anna Roig. He will be working on the synthesis and characterization of magnetic and plasmonic gold nanotriangles

Welcome back!

Hot off the press: new article in small! Alignment under magnetic field of mixed iron oxide/silica colloidal mesoporous particles induced by shape anisotropy

Scheme of the preparation of the mixed iron oxide/silica rod-like colloidal particles.

A new paper entitled “Alignment under magnetic field of mixed Fe2O3/SiOcolloidal mesoporous particles induced by shape anisotropy” (Jheng-Guang Li, Giulia Fornasieri, Anne Bleuzen, Martí Gich, Alexander Gloter, Frédéric Bouquet, Marianne Impéror-Clerc, DOI: 10.1002/smll.201602272) has been publised in small this last September 14, 2016. Congratulations Martí!

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Farewell to Iván and Seminar of Esther Dalfo on biomedical applications of C. elegans

Iván GómezToday during the group meeting we said goodbye to Iván, who is leaving to continue his Ph.D. thesis in Colombia. Iván is a great chemist, who works with magnetic graphene for water decontamination. We wish him a lot of success in his thesis and in his future endeavours!

Esther Dalfo

On the other hand, Esther Dalfo gave us a nice talk on biomedical applications of C. elegans “Investigating neurodegeneration by using the nematode Caenorhabditis elegans”. Esther is an Associate Researcher at the Institute of Neuroscience of the UAB, specialized in neurodegeneration and human genetics. Thank you! 

Group Meeting


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