Printed organic TFTs on flexible substrate for complementary circuits

Organic Thin film Transistors (OTFT) have been widely investigated in these last years as potential candidate for the development of low cost, flexible and lightweight active-matrix backplanes for display applications. Indeed the organic semiconductors provide both promising electrical performances tunable by chemistry and the ability to be processed at low temperature with innovative printing technics on various large scale substrates. Thanks to the recent developments on both n-type and p-type solution-processed organic semiconductors, we have developed a printable organic complementary technology compatible with flexible PEN substrates. By combining state of the art materials exhibiting mobility in the range of 1 cm 2 /V.s and silicon inspired compact modeling and simulation approach, we were able to design and fabricate circuit's building blocks that provide the switching, digital and analog functions required for the fabrication of printed systems on foil

Self-organized nanoclusters in solution-processed mesoporous In-Ga-Zn-O thin films

International audienceSelf-organized nanoclusters were obtained in annealed solution-processed In-Ga-Zn-O thin films. STEM and anomalous grazing incidence small-angle X-ray scattering (GISAXS) reveal the formation of nanometer-sized nanoclusters together with the spontaneous creation of a mesopore pattern

Chemically improved high performance solution processed indium gallium zinc oxide thin-film transistors

Författare Lynard, M. Det glömda rummet. Trädgård som välbefinnande miljö för ensamkommande barn? Examensarbete i socialt arbete 30 högskolepoäng. Malmö högskola: Fakulteten för hälsa och samhälle, institutionen för Socialt arbete 2016. Syftet med studien är att undersöka om ensamkommande barn som är placerade på HVB-hem skulle kunna må bättre genom att använda den utemiljö som finns i anslutning till HVB-hem när de blir placerade där. Syftet är också att ta reda på om man skulle kunna använda vistelse i trädgård som metod på HVB-hemmet. Detta har gjorts genom intervjuer med ensamkommande barn som bor på ett HVB-hem, samt intervjuer med praktiker som arbetat i projekt där trädgård varit metoden i det sociala arbetet. Det finns forskning som visar att tid i trädgårdsmiljöer kan förbättra hälsotillståndet hos stresspatienter. Det finns även forskning som visar att vistelse i trädgård ger en känsla av sammanhang och en upplevelse att vara i nuet. De som flytt krig bär ofta på traumatiska upplevelser som på olika sätt kommer till uttryck i psykisk ohälsa. Det kan vara stress, sömnsvårigheter, posttraumatisk stressyndrom eller ångest. Kommunen ansvarar för att hjälpa de ensamkommande barnen mot ett bättre mående, men kunskap om hur vi på bästa sätt hjälper dessa barn är bristfällig. En tanke om att vistelse i trädgård kan hjälpa dessa barn till bättre mående var därför viktigt att undersöka. Resultatet i studien visar på att ensamkommande barn har en längtan efter att vistas mer i trädgården. De beskriver att trädgården är en plats där de kan komma i kontakt med minnen från sitt hemland och därigenom vara i ett sammanhang. Trädgården och odlingen ger ett sammanhang som är viktigt för att bygga den nya identiteten i det nya landet. Det har i undersökningen visat sig att trädgården kan vara en plats där ensamkommande barn kan reglera sina känslor och en plats där de kan få tillgång till positiva känslor och där igenom må bättre. Det kan uppstå betydelsefulla samtal mellan personal och boende när de gör saker tillsammans i trädgården. Dessa samtal skiljer sig från samtalen inomhus, där man mest verkar pratar om de rutiner och strukturer som finns på HVB-hemmet. Dessa samtal kan vara viktiga ur många aspekter, så som att skapa relationer, bli sedd och hörd och bygga en bro mellan då och nu, som kan hjälpa de ensamkommande mot bättre mående.Author Lynard, M. The forgotten room. Garden as a comforting environment for unaccompanied minor refugees?Thesis in social work 30 University points. Malmo hogskola. Faculty for health and society, institution for social work 2016.The purpose with this study is to investigate if unaccompanied minors who are placed in foster homes would attain a better health when using the outdoor environment which is in the vicinity of the foster homes in which they are placed. The purpose is also to investigate if its possible to use time in the garden as a method in the foster homes. This study has been done through interviews with unaccompanied minors who lives in a foster home, and through interviews with staff working in a project were garden was a method in their social work.There is research showing that time in the garden environments can improve health for stress patients. There is also research showing that time in the garden gives a feeling of coherence and a sense of being in the presence. Those who have fled from war have often been exposed to traumatizing experiences which in various ways leads to mental illness. The symptoms can be stress, disruption of sleep, post traumatic stress disorder or anxiety. The municipality is responsible to aid the unaccompanied minors to attain a better mental health, but the knowledge on how to provide the aid is insufficient. It was important to investigate the idea to use time in the garden as a means to help these minors improve their health.The result of the study shows that unaccompanied minors has a desire to stay more time in the garden. They describe the garden as a place were they can connect to memories from their native country and thereby feel a sense of coherence. The garden and the cultivation of it gives a coherence which is important to create a new identity in their new country.The investigation has shown that the garden can be a place were the unaccompanied minors can regulate their emotions and a place were they can access positive emotions and hence feel better. It can infuse important conversations between the minor and staff when they do things together in the garden. These conversations differ from the conversations that take place indoors, which tend to deal with routine and structures of the foster home. These conversations can be vital in many aspects, like establishing relations, to be seen and heard and build a bridge between the past and the present. This can help the unaccompanied minors to improve their health

Chemically improved high performance solution processed indium gallium zinc oxide thin-film transistors

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Effect of thermal annealing on the morphology of sol–gel processed barium strontium titanate thin films: Consequences on electrical properties

International audienceThe link between the morphology and the electrical properties of the sol–gel processed Ba0.7Sr0.3TiO3 thin films is investigated. Previous studies have not fully explained the differences in growth morphology as a function of the elaboration conditions. The thin films were investigated by Grazing Incidence Small-Angle X-ray Scattering (GISAXS), x-ray diffraction, and scanning electron microscopy. More precisely, prototype films were studied as a function of the annealing temperature: at low temperatures (140 °C–200 °C) by in situ GISAXS and at high temperatures (600 °C–800 °C) by ex situ GISAXS. At ∼150 °C, self-organized domains with a preferential distance of approximately 14 nm are formed. At high annealing temperatures, the growing domains become either nanoparticles or pores with a preferential distance of approximately 85 nm at 600 °C. This growth evolution is successfully explained by a general model based on convection and evaporation. With thermal annealing, the characteristic lengths parallel to the surface increase due to convection and the characteristic lengths perpendicular to the surface decrease due to evaporation. In addition, two types of annealing were investigated at 700 °C. For annealing after each other layer, a growth with vertically shifted particles occurs with no ferroelectric behavior. On the contrary, for annealing after each deposited layer, a columnar growth occurs and a ferroelectric hysteresis loop is obtained. The ferroelectricity of the sol–gel barium strontium titanate thin films is definitely linked to the complete removal of organic constituents leading to columnar growth

Étude d'une antenne flexible bow-tie double bande réalisée par gravure laser et par sérigraphie

International audienceNous présentons dans cet article une antenne bow-tie planaire flexible conçue pour deux bandes de fréquence : 5,8 GHz et 15 GHz. L'étude présentée s'inscrit dans une collaboration scientifique entre l'IM2NP et le CEA-Liten pour l'évaluation des potentialités offertes par les technologies d'impression par sérigraphie sur substrats souples. L'article propose une comparaison entre deux antennes réalisées par deux méthodes différentes. La première gravée à l'aide d'une machine de prototypage rapide par gravure laser à l'IM2NP sur Taconic RF35 et la seconde imprimée par sérigraphie au CEA-Liten sur Kapton de même épaisseur. Les métallisations de l'antenne gravée sont en cuivre et en encre à nanoparticules d'argent pour l'antenne imprimée. L'antenne est simulée à l'aide du logiciel ANSOFT HFSS 2020 R2

Étude d'une antenne flexible bow-tie double bande réalisée par gravure laser et par sérigraphie

International audienceNous présentons dans cet article une antenne bow-tie planaire flexible conçue pour deux bandes de fréquence : 5,8 GHz et 15 GHz. L'étude présentée s'inscrit dans une collaboration scientifique entre l'IM2NP et le CEA-Liten pour l'évaluation des potentialités offertes par les technologies d'impression par sérigraphie sur substrats souples. L'article propose une comparaison entre deux antennes réalisées par deux méthodes différentes. La première gravée à l'aide d'une machine de prototypage rapide par gravure laser à l'IM2NP sur Taconic RF35 et la seconde imprimée par sérigraphie au CEA-Liten sur Kapton de même épaisseur. Les métallisations de l'antenne gravée sont en cuivre et en encre à nanoparticules d'argent pour l'antenne imprimée. L'antenne est simulée à l'aide du logiciel ANSOFT HFSS 2020 R2

Étude d'une antenne flexible bow-tie double bande réalisée par gravure laser et par sérigraphie

International audienceNous présentons dans cet article une antenne bow-tie planaire flexible conçue pour deux bandes de fréquence : 5,8 GHz et 15 GHz. L'étude présentée s'inscrit dans une collaboration scientifique entre l'IM2NP et le CEA-Liten pour l'évaluation des potentialités offertes par les technologies d'impression par sérigraphie sur substrats souples. L'article propose une comparaison entre deux antennes réalisées par deux méthodes différentes. La première gravée à l'aide d'une machine de prototypage rapide par gravure laser à l'IM2NP sur Taconic RF35 et la seconde imprimée par sérigraphie au CEA-Liten sur Kapton de même épaisseur. Les métallisations de l'antenne gravée sont en cuivre et en encre à nanoparticules d'argent pour l'antenne imprimée. L'antenne est simulée à l'aide du logiciel ANSOFT HFSS 2020 R2