Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425354
Francesca Di Benedett, A. D’amore, M. Mosca, M. Massaro, G. Cassano, L. Capodieci, C. Esposito, L. Tapfer
Ion irradiation of polymers has become a wide field attracting much interest for the fabrication of novel hybrid materials with excellent physical properties for technological applications [1]–[2]. In this work, we report on implantation of Cr+ and Pd+ ions in inert polymers in order to promote the formation of dispersed metal nanoparticles or continuous thin film below the polymer surface. To this purpose, different thermoplastic polymers, Polymethylmetacrylate (PMMA), Polypropylene (PP), Polycarbonate (PC) and Polyethylene terephthalate glycol modified (PETG), were irradiated at room temperature using high-dose implantation ranging between 1015 and 1017 cm-2 by using a DANFYSIK 1090 high current ion implanter (200keV). The ion energy used was 60keV and 90keV for Cr+ and Pd+ ions, respectively. The ion implantation process, in particular regarding the implanted depth profile and surface damage, was simulated by TRIM calculations. The morphological and structural modification induced in the produced metal/polymer nanocomposites were investigated by glancing-incidence X-ray diffraction (GIXRD) and scanning electron microscopy (FE-SEM) observations. Furthermore, electrical resistance of near-surface metal-polymer nanocomposite was measured at room temperature.
{"title":"Ion Implantation in thermoplastic polymers","authors":"Francesca Di Benedett, A. D’amore, M. Mosca, M. Massaro, G. Cassano, L. Capodieci, C. Esposito, L. Tapfer","doi":"10.1109/NANOFIM.2015.8425354","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425354","url":null,"abstract":"Ion irradiation of polymers has become a wide field attracting much interest for the fabrication of novel hybrid materials with excellent physical properties for technological applications [1]–[2]. In this work, we report on implantation of Cr+ and Pd+ ions in inert polymers in order to promote the formation of dispersed metal nanoparticles or continuous thin film below the polymer surface. To this purpose, different thermoplastic polymers, Polymethylmetacrylate (PMMA), Polypropylene (PP), Polycarbonate (PC) and Polyethylene terephthalate glycol modified (PETG), were irradiated at room temperature using high-dose implantation ranging between 1015 and 1017 cm-2 by using a DANFYSIK 1090 high current ion implanter (200keV). The ion energy used was 60keV and 90keV for Cr+ and Pd+ ions, respectively. The ion implantation process, in particular regarding the implanted depth profile and surface damage, was simulated by TRIM calculations. The morphological and structural modification induced in the produced metal/polymer nanocomposites were investigated by glancing-incidence X-ray diffraction (GIXRD) and scanning electron microscopy (FE-SEM) observations. Furthermore, electrical resistance of near-surface metal-polymer nanocomposite was measured at room temperature.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"34 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116593546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425280
F. Conversano, R. Franchini, P. Pisani, A. Greco, M. Di Paola, S. Casciaro
Every biomedical imaging technique exploits different physical principles and can provide peculiar information, which is often unachievable with different techniques and can be further enhanced by the employment of suitable contrast agents (CAs). However, each imaging technique typically requires its own specific CAs, with corresponding increments of procedure duration, costs and invasiveness for the patients, who should undergo two injections. In the last years, great effort has been addressed toward the development of multimodal CAs that can be real-time detected by different techniques. In this context, we developed a new type of bimodal nanoparticles (NPs), consisting of silica nanospheres (NSs) covered by an outer shell of smaller superparamagnetic NPs, to be used as dual-mode imaging CAs for ultrasound and magnetic resonance imaging techniques. Aim of the present study was to evaluate the echographic detectability of these bimodal NPs through a recently developed algorithm that was originally implemented to detect pure silica NSs. In particular, we performed a series of “in vitro” experiments on custom-designed tissue- mimicking phantoms, focused on a specific objective of direct clinical interest: the detection of multimodal NPs with a diameter of about 330 nm at a low and biocompatible volume concentration (0.2 %). The obtained results demonstrated the possibility of deleting the US echoes coming from structures other than NPs with high effectiveness, therefore enhancing the brightness of nanosized contrast agents in the final diagnostic images. The effectiveness of the proposed method shows very promising perspectives for future clinical applications.
{"title":"A Dual Frequency Ultrasound Technique for the Improved Detection of Bimodal Nanosized Contrast Agents","authors":"F. Conversano, R. Franchini, P. Pisani, A. Greco, M. Di Paola, S. Casciaro","doi":"10.1109/NANOFIM.2015.8425280","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425280","url":null,"abstract":"Every biomedical imaging technique exploits different physical principles and can provide peculiar information, which is often unachievable with different techniques and can be further enhanced by the employment of suitable contrast agents (CAs). However, each imaging technique typically requires its own specific CAs, with corresponding increments of procedure duration, costs and invasiveness for the patients, who should undergo two injections. In the last years, great effort has been addressed toward the development of multimodal CAs that can be real-time detected by different techniques. In this context, we developed a new type of bimodal nanoparticles (NPs), consisting of silica nanospheres (NSs) covered by an outer shell of smaller superparamagnetic NPs, to be used as dual-mode imaging CAs for ultrasound and magnetic resonance imaging techniques. Aim of the present study was to evaluate the echographic detectability of these bimodal NPs through a recently developed algorithm that was originally implemented to detect pure silica NSs. In particular, we performed a series of “in vitro” experiments on custom-designed tissue- mimicking phantoms, focused on a specific objective of direct clinical interest: the detection of multimodal NPs with a diameter of about 330 nm at a low and biocompatible volume concentration (0.2 %). The obtained results demonstrated the possibility of deleting the US echoes coming from structures other than NPs with high effectiveness, therefore enhancing the brightness of nanosized contrast agents in the final diagnostic images. The effectiveness of the proposed method shows very promising perspectives for future clinical applications.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132681575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425278
F. Spano, R. Rossi, A. Massaro, A. Lay-Ekuakille
Innovative conductive nanocomposite materials (NCM) could represent an important evolution for sensors and electronics applications. The design and processing of conductive elements as electrodes directly in a polymeric bulk material can be considered as an interesting improvement. By this way, the use of an Atomic Force Microscope (AFM) instrument with its accurate and precise motorized table and its implemented laser can be used for designing conductive elements in polymeric materials. In that case, 805 nm infrared (IR) laser light from the AFM instrument inducing surface texturing on Chitosan/Au Precursor (C/AuP) substrate is reported. Surface patterns consisting of designed structures were produced by laser texturing. By fine-tuning key parameters as the programmed movement of the motorized table supporting the substrate in accordance to the laser movement as well as the working distance, Au nanoparticles (AuNP) were locally generated. Micro patterns have been generated on the nanocomposite C/AuP surface. By the use of NCM able to generate in-situ nanoparticles (NP) under light stimulation, micro structures can be generated on the NCM surfaces, preserving their flexibility and easy processability. Control of conductive properties is desirable in a wide range of domains as medicine, health care and industry in particular, especially, if the material properties can be modified by a simple technique.
{"title":"AFM Laser Texturing on Chitosan/Au Precursor nanocomposite Materials for Lithography Technique","authors":"F. Spano, R. Rossi, A. Massaro, A. Lay-Ekuakille","doi":"10.1109/NANOFIM.2015.8425278","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425278","url":null,"abstract":"Innovative conductive nanocomposite materials (NCM) could represent an important evolution for sensors and electronics applications. The design and processing of conductive elements as electrodes directly in a polymeric bulk material can be considered as an interesting improvement. By this way, the use of an Atomic Force Microscope (AFM) instrument with its accurate and precise motorized table and its implemented laser can be used for designing conductive elements in polymeric materials. In that case, 805 nm infrared (IR) laser light from the AFM instrument inducing surface texturing on Chitosan/Au Precursor (C/AuP) substrate is reported. Surface patterns consisting of designed structures were produced by laser texturing. By fine-tuning key parameters as the programmed movement of the motorized table supporting the substrate in accordance to the laser movement as well as the working distance, Au nanoparticles (AuNP) were locally generated. Micro patterns have been generated on the nanocomposite C/AuP surface. By the use of NCM able to generate in-situ nanoparticles (NP) under light stimulation, micro structures can be generated on the NCM surfaces, preserving their flexibility and easy processability. Control of conductive properties is desirable in a wide range of domains as medicine, health care and industry in particular, especially, if the material properties can be modified by a simple technique.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122160930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425339
E. Panzarini, S. Mariano, C. Vergallo, G. Fimia, L. Dini, F. Mura, M. Rossi, A. Serra, S. Casciaro
The present investigation was aimed to study the uptake of glucose capped silver nanoparticles (AgNPs-G) by human epithelioid cervix carcinoma (HeLa) cells and the nanoparticles effect on cell cycle progression. Cells were exposed to two different amounts (2×103and 2×104NPs/cell) of AgNPs-G (average size 10 nm) for different times (15 and 30 minutes, 1, 3, 6, 12, 18 and 24 hrs). The uptake of AgNPs by HeLa cells was evaluated by using Graphite Furnace-Atomic Absorption Spectrometry (GF -AAS) and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX) analysis. Cell cycle was investigated by Fluorescence Activated Cell Sorting (FACS) analysis. AgNPs-G were abundantly taken up by HeLa cells within 2 h of treatment and induced cytotoxicity in a NPs amount- and incubation time- dependent manner. The treatment also determined a AgNPs-G concentration- and time-dependent S and G2/M arrest. The possible influence of the cell cycle on cellular uptake of AgNPs-G needs, however, to be further investigated since the dose of internalized nanoparticles in each cell could vary as the cell advances through the cell cycle.
{"title":"Glucose capped silver nanoparticles enter HeLa cells and induce S and G2/M arrest","authors":"E. Panzarini, S. Mariano, C. Vergallo, G. Fimia, L. Dini, F. Mura, M. Rossi, A. Serra, S. Casciaro","doi":"10.1109/NANOFIM.2015.8425339","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425339","url":null,"abstract":"The present investigation was aimed to study the uptake of glucose capped silver nanoparticles (AgNPs-G) by human epithelioid cervix carcinoma (HeLa) cells and the nanoparticles effect on cell cycle progression. Cells were exposed to two different amounts (2×103and 2×104NPs/cell) of AgNPs-G (average size 10 nm) for different times (15 and 30 minutes, 1, 3, 6, 12, 18 and 24 hrs). The uptake of AgNPs by HeLa cells was evaluated by using Graphite Furnace-Atomic Absorption Spectrometry (GF -AAS) and Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDX) analysis. Cell cycle was investigated by Fluorescence Activated Cell Sorting (FACS) analysis. AgNPs-G were abundantly taken up by HeLa cells within 2 h of treatment and induced cytotoxicity in a NPs amount- and incubation time- dependent manner. The treatment also determined a AgNPs-G concentration- and time-dependent S and G2/M arrest. The possible influence of the cell cycle on cellular uptake of AgNPs-G needs, however, to be further investigated since the dose of internalized nanoparticles in each cell could vary as the cell advances through the cell cycle.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125001555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425346
J. G. Buijnsters, S. Carabineiro, A.M.T. Silva, L. M. Pastrana-Martínez, S. Morales-Torres, J. Faria, J. Figueiredo
In this work, the use of nanodiamonds (NDs; 2–10 nm) in the seeding of diamond films grown by chemical vapor deposition (CVD) and in the synthesis of composite TiO2-nanodiamond photocatalysts is discussed. First, enhanced growth of faceted, nanocrystalline diamond (NCD) films by hot filament CVD at moderate substrate temperature (650°C) and carbon-lean gas chemistry (1.0% CH4 in H2) is demonstrated. The enhancement of diamond nucleation and growth on Si substrates is achieved by using a sputter deposition of different metallic (Cr, Nb, Ti, V, and W) nanolayers and an ultrasonic seeding with NDs. We conclude that the kinetics of diamond nucleation in the NCD film growth is determined by the number density of NDs embedded on the nanorough metallic surfaces after ultrasonic pretreatment and by the specific surface chemistry (i.e., carbon diffusivity and carburization) during diamond growth. Second., the synthesis and application of composites based on microdiamonds and NDs for the photocatalytic degradation of diphenhydramine pharmaceutical water pollutant is demonstrated. Micro- and nanodiamond powders were combined with TiO2, varying the carbon phase content and tested as composite photocatalysts under near UV-Vis irradiation. The thus prepared composites exhibited higher photocatalytic activity than the respective bare materials. Best photocatalytic performance was observed in the case of using composites with 15 wt.% of NDs oxidized in air at 703 K.
{"title":"The use of nanodiamonds in the seeding of CVD diamond and in heterogeneous catalysis","authors":"J. G. Buijnsters, S. Carabineiro, A.M.T. Silva, L. M. Pastrana-Martínez, S. Morales-Torres, J. Faria, J. Figueiredo","doi":"10.1109/NANOFIM.2015.8425346","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425346","url":null,"abstract":"In this work, the use of nanodiamonds (NDs; 2–10 nm) in the seeding of diamond films grown by chemical vapor deposition (CVD) and in the synthesis of composite TiO2-nanodiamond photocatalysts is discussed. First, enhanced growth of faceted, nanocrystalline diamond (NCD) films by hot filament CVD at moderate substrate temperature (650°C) and carbon-lean gas chemistry (1.0% CH4 in H2) is demonstrated. The enhancement of diamond nucleation and growth on Si substrates is achieved by using a sputter deposition of different metallic (Cr, Nb, Ti, V, and W) nanolayers and an ultrasonic seeding with NDs. We conclude that the kinetics of diamond nucleation in the NCD film growth is determined by the number density of NDs embedded on the nanorough metallic surfaces after ultrasonic pretreatment and by the specific surface chemistry (i.e., carbon diffusivity and carburization) during diamond growth. Second., the synthesis and application of composites based on microdiamonds and NDs for the photocatalytic degradation of diphenhydramine pharmaceutical water pollutant is demonstrated. Micro- and nanodiamond powders were combined with TiO2, varying the carbon phase content and tested as composite photocatalysts under near UV-Vis irradiation. The thus prepared composites exhibited higher photocatalytic activity than the respective bare materials. Best photocatalytic performance was observed in the case of using composites with 15 wt.% of NDs oxidized in air at 703 K.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129179847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425349
Chiara Rosato, P. Scopece, P. Schiavuta, M. Scatto, F. Felline, A. Tinti
Polymer nanocomposites are a new class of innovative materials in which well-dispersed fillers, having at least one dimension in the nanometric range, are incorporated into organic polymer matrix. Because of their nanometer-size dispersion, polymer nanocomposites exhibit improved mechanical, thermal and chemical properties when they are compared with pristine polymer or conventional composites. Layered inorganic nanostructures, which are fillers very used in polymer nanocomposite researches, can be intercalated or exfoliated into polymer matrix. Because of the larger surface area and high aspect ratio of the nanoclay layers, the exfoliated structures generally provide the best performances. Several strategies have been proposed by Veneto Nanotech and CETMA synergy in melt compounding for thermoplastic polymer nanocomposites production and in foam nanocomposites production. Layered silicate/polymer nanocomposites can be useful in different applications (such as packaging, bio-medicine and thermal insulation materials).
{"title":"Active Polymer Nanocomposites: application in thermoplastic polymers and in polymer foams","authors":"Chiara Rosato, P. Scopece, P. Schiavuta, M. Scatto, F. Felline, A. Tinti","doi":"10.1109/NANOFIM.2015.8425349","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425349","url":null,"abstract":"Polymer nanocomposites are a new class of innovative materials in which well-dispersed fillers, having at least one dimension in the nanometric range, are incorporated into organic polymer matrix. Because of their nanometer-size dispersion, polymer nanocomposites exhibit improved mechanical, thermal and chemical properties when they are compared with pristine polymer or conventional composites. Layered inorganic nanostructures, which are fillers very used in polymer nanocomposite researches, can be intercalated or exfoliated into polymer matrix. Because of the larger surface area and high aspect ratio of the nanoclay layers, the exfoliated structures generally provide the best performances. Several strategies have been proposed by Veneto Nanotech and CETMA synergy in melt compounding for thermoplastic polymer nanocomposites production and in foam nanocomposites production. Layered silicate/polymer nanocomposites can be useful in different applications (such as packaging, bio-medicine and thermal insulation materials).","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121329937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425358
A. Lay-Ekuakille, G. Cicala, A. Massaro, L. Velardi, G. Senesi
Diamond films grown by microwave plasma enhanced chemical vapor deposition technique exhibit different electrical conductivity. In particular, many factors such as substrate type, more or less hydrogenated surface, aging and doping change the electrical current of the diamond surface. There is an increasing need of diamond film for manifold applications because of its excellent behavior in emerging activities such as high-performing telecommunication systems, high-sensitive detecting pathology sensors within noisy human matrices with or without contrast agent, etc. Moreover, new ideas are still coming out from researchers and scientists to give out benefits to the entire area of research. The major finding is to carried circuit components and wired elements. In this paper we report the I- V characteristics of two polycrystalline diamond (PCD) films grown on intrinsic (i-Si) and p-doped silicon (p-Si) substrates. At 40 V the current of PCD film grown on p-Si is one order of magnitude higher than one on i-Si. The result suggests a possible application of diamond films in circuital elements or in more complex electronic components integrated into different substrates.
{"title":"Diamond Films for Electrical and Electronic Circuitry","authors":"A. Lay-Ekuakille, G. Cicala, A. Massaro, L. Velardi, G. Senesi","doi":"10.1109/NANOFIM.2015.8425358","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425358","url":null,"abstract":"Diamond films grown by microwave plasma enhanced chemical vapor deposition technique exhibit different electrical conductivity. In particular, many factors such as substrate type, more or less hydrogenated surface, aging and doping change the electrical current of the diamond surface. There is an increasing need of diamond film for manifold applications because of its excellent behavior in emerging activities such as high-performing telecommunication systems, high-sensitive detecting pathology sensors within noisy human matrices with or without contrast agent, etc. Moreover, new ideas are still coming out from researchers and scientists to give out benefits to the entire area of research. The major finding is to carried circuit components and wired elements. In this paper we report the I- V characteristics of two polycrystalline diamond (PCD) films grown on intrinsic (i-Si) and p-doped silicon (p-Si) substrates. At 40 V the current of PCD film grown on p-Si is one order of magnitude higher than one on i-Si. The result suggests a possible application of diamond films in circuital elements or in more complex electronic components integrated into different substrates.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132159245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425353
C. E. Corcione, Lara Natta, F. Scalera, F. Montagna, A. Sannino, A. Maffezzoli
The need of reconstructing complex bone defects in the maxillo-facial region as a result of trauma, tumour surgery or congenital malformation has become a hot topic in the field of tissue engineering. Digital tools such as 3D CAD systems and rapid prototyping (RP) machines are a useful tool to realize custom made bone scaffolds. RP techniques allow the construction of complex physical models based on 3D clinical images elaborated by suitable software and CAD systems. Hydroxyapatite (HA) is one of the most used material for bone restoring because of its composition very closed to human bones and teeth. Producing a custom-made scaffold in a ceramic material directly by RP is therefore an exciting challenge. The aim of the present work was to investigate the potential of RP processes as a manufacturing method for products intended for personalized treatments by exploring the production of novel hydroxyapatite-based feedstock materials for RP purposes. Materials for two different kind of RP techniques were deeply characterized, evidencing that the presence of HA is able to greatly increase their physical, thermal and mechanical properties. Composites were subsequently used to obtain 3d structures by RP instruments.
{"title":"Rapid Prototyping of hydroxyapatite polymer based nanocomposites for bone tissue engineering","authors":"C. E. Corcione, Lara Natta, F. Scalera, F. Montagna, A. Sannino, A. Maffezzoli","doi":"10.1109/NANOFIM.2015.8425353","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425353","url":null,"abstract":"The need of reconstructing complex bone defects in the maxillo-facial region as a result of trauma, tumour surgery or congenital malformation has become a hot topic in the field of tissue engineering. Digital tools such as 3D CAD systems and rapid prototyping (RP) machines are a useful tool to realize custom made bone scaffolds. RP techniques allow the construction of complex physical models based on 3D clinical images elaborated by suitable software and CAD systems. Hydroxyapatite (HA) is one of the most used material for bone restoring because of its composition very closed to human bones and teeth. Producing a custom-made scaffold in a ceramic material directly by RP is therefore an exciting challenge. The aim of the present work was to investigate the potential of RP processes as a manufacturing method for products intended for personalized treatments by exploring the production of novel hydroxyapatite-based feedstock materials for RP purposes. Materials for two different kind of RP techniques were deeply characterized, evidencing that the presence of HA is able to greatly increase their physical, thermal and mechanical properties. Composites were subsequently used to obtain 3d structures by RP instruments.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132472809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425348
Professor Elvira Williams
This paper designs a robot rapid moving strategy based on curve model. The virtual target points are introduced into the path planning of the robot so that the robot can complete the task smoothly and quickly. We give the method to solve the curve model in detail. At the same time, the design of state feedback from the robot control model based on the turning radius is used to solve the practical error problem. Simulation experiments show that the design of virtual target points can not only make the robot complete the task faster, but also can be applied to multi-robot formation control. The real experiment shows that the curve model can correct the error through the robot state feedback and finally make the robots reach the target point successfully.
{"title":"Low Cost Diamond-Like-Carbon (DLC) Thin Films: Nanotechnology Transfer from Academia to Industry","authors":"Professor Elvira Williams","doi":"10.1109/NANOFIM.2015.8425348","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425348","url":null,"abstract":"This paper designs a robot rapid moving strategy based on curve model. The virtual target points are introduced into the path planning of the robot so that the robot can complete the task smoothly and quickly. We give the method to solve the curve model in detail. At the same time, the design of state feedback from the robot control model based on the turning radius is used to solve the practical error problem. Simulation experiments show that the design of virtual target points can not only make the robot complete the task faster, but also can be applied to multi-robot formation control. The real experiment shows that the curve model can correct the error through the robot state feedback and finally make the robots reach the target point successfully.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129370166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2015-07-01DOI: 10.1109/NANOFIM.2015.8425351
A. Massaro, G. Senesi, L. Velardi, G. Cicala, A. Valentini, D. Marzulli
The self-assembly of pillar-like structures in nanodiamond (ND) layers was obtained by means of a controlled pulsed spray technique. This technique enabled to deposit ND layers directly on silicon substrate using as-received 250 nm nanocrystals. The morphology of the obtained ND layer was characterized by confocal and atomic force microscopies, which provided evidence of the existence of self-assembled pillar-like structures due to the coffee stain effect. The local electrical current and voltage of an isolated ND pillar was also studied by scanning Kelvin probe microscopy (SKPM) and scanning capacitance microscopy (SCM). This study showed that the pillar features an increase of voltage (SKPM) and a decrease of current (SCM). Specifically, the pillar current is lower than that of the surrounding hole. A model based on the finite element method (FEM) confirmed the electrical behavior found by SCM.
{"title":"Local Electrical Current and Voltage of Self-Assembled Nanodiamond Pillars","authors":"A. Massaro, G. Senesi, L. Velardi, G. Cicala, A. Valentini, D. Marzulli","doi":"10.1109/NANOFIM.2015.8425351","DOIUrl":"https://doi.org/10.1109/NANOFIM.2015.8425351","url":null,"abstract":"The self-assembly of pillar-like structures in nanodiamond (ND) layers was obtained by means of a controlled pulsed spray technique. This technique enabled to deposit ND layers directly on silicon substrate using as-received 250 nm nanocrystals. The morphology of the obtained ND layer was characterized by confocal and atomic force microscopies, which provided evidence of the existence of self-assembled pillar-like structures due to the coffee stain effect. The local electrical current and voltage of an isolated ND pillar was also studied by scanning Kelvin probe microscopy (SKPM) and scanning capacitance microscopy (SCM). This study showed that the pillar features an increase of voltage (SKPM) and a decrease of current (SCM). Specifically, the pillar current is lower than that of the surrounding hole. A model based on the finite element method (FEM) confirmed the electrical behavior found by SCM.","PeriodicalId":413629,"journal":{"name":"2015 1st Workshop on Nanotechnology in Instrumentation and Measurement (NANOFIM)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114686228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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