{"id":116,"date":"2022-11-02T13:07:59","date_gmt":"2022-11-02T13:07:59","guid":{"rendered":"http:\/\/grehsen.inoe.ro\/?page_id=116"},"modified":"2022-11-02T13:07:59","modified_gmt":"2022-11-02T13:07:59","slug":"brief-presentation-prezentare-succinta","status":"publish","type":"page","link":"https:\/\/grehsen.inoe.ro\/index.php\/brief-presentation-prezentare-succinta\/","title":{"rendered":"Brief presentation\/Prezentare succinta"},"content":{"rendered":"\n

EN: <\/strong>The efficient use of water and other resources as well as the development of an automated monitoring system are key issues in agriculture. The project \u2013 Ultrasensitive gas sensor array for greenhouse environment assessment (GreHSEN) \u2013 developed a monitoring sensor array which can specifically evaluate the level of dangerous gases produced inside of greenhouses (CO2<\/sub>, NH3<\/sub>). The demonstration model is an experimental model consisting in an integrated gas sensors array and an appropriate data acquisition system. The integrated gas sensors array is based on functionalized graphenes, which allows amplification of detected electrical signals. The detection mechanism is based on the variation of resistivity\/conductivity and interfacial properties of the active semiconductor layer (in our case the semiconductive polymer-modified graphene layer) when exposed to different gases. The typical sensing mechanism is as follows: first, the target analyte comes into contact with the sensing layer; the analyte affects the semiconductor layer with various molecular interactions, changing the distribution of the charge carrier density; this change in the charge carrier density results in a change in the resistivity of the sensors. We synthesized by electropolymerization and magnetron sputtering thin layers of graphene \u2013polyaniline and graphene-polypyrrole and tested them to CO2<\/sub> and NH3<\/sub>. The sensor array showed a good response to the gases and fast recovery. The most important result obtained during the implementation of the project was the integration of the sensor array with the data acquisition system, that can actively monitor and transmit data in real-time. We disseminated our results in 7 articles published in ISI journals, 2 ISI articles pending evaluation, and 12 participations to international conference.<\/p>\n\n\n\n

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RO: <\/strong>Utilizarea eficient\u0103 a apei \u0219i a altor resurse, precum \u0219i dezvoltarea unui sistem automat de monitorizare a aerului sunt probleme cheie \u00een agricultur\u0103. Proiectul \u2013 Arie de senzori ultrasensibili pentru monitorizarea calitatii aerului din sere (GreHSEN)<\/strong> \u2013 a dezvoltat o arie de senzori de gaze pentru monitorizarea nivelului gazelor periculoase produse \u00een interiorul serelor (CO2<\/sub>, NH3<\/sub>). Modelul demonstrativ este un model experimental const\u00e2nd \u00eentr-o matrice integrat\u0103 de senzori de gaz \u0219i un sistem adecvat de achizi\u021bie de date. Matricea integrat\u0103 de senzori de gaz se bazeaz\u0103 pe grafene func\u021bionaliza\u021be, care permit amplificarea semnalelor electrice detectate. Mecanismul de detectare se bazeaz\u0103 pe varia\u021bia rezistivit\u0103\u021bii\/conductivit\u0103\u021bii \u0219i a propriet\u0103\u021bilor de interfa\u021b\u0103 ale stratului semiconductor activ (\u00een cazul nostru, stratul de grafena functionalizata cu polimeri semiconductori) atunci c\u00e2nd este expus la diferite gaze. Mecanismul de detectare tipic este urm\u0103torul: mai \u00eent\u00e2i, analitul \u021bint\u0103 intr\u0103 \u00een contact cu stratul sensibil; analitul afecteaz\u0103 stratul semiconductor prin diverse interac\u021biuni moleculare, modific\u00e2nd distribu\u021bia densit\u0103\u021bii purt\u0103torului de sarcin\u0103; aceast\u0103 modificare a densit\u0103\u021bii purt\u0103torului de sarcin\u0103 are ca rezultat o modificare a rezistivit\u0103\u021bii senzorilor. In cadrul proiectului s-au sintetizat prin electropolimerizare \u0219i prin magnetron sputtering straturi sub\u021biri de grafena-polianilin\u0103 \u0219i grafena-polipirol. Aceste straturi au fost testate la CO2<\/sub> \u0219i NH3<\/sub>. Aria de senzori a indicat un r\u0103spuns bun la aceste gaze \u0219i o recuperare rapid\u0103 in urma regenerarii stratului sensibil. Cel mai important rezultat ob\u021binut \u00een timpul implement\u0103rii proiectului a fost integrarea matricei de senzori cu sistemul de achizi\u021bie de date, care poate monitoriza \u0219i transmite datele \u00een timp real. Rezultatele au fost diseminate in cadrul a 7 articole publicate \u00een reviste ISI, 2 articole ISI in evaluare \u0219i 12 particip\u0103ri la conferin\u021be interna\u021bionale.<\/p>\n","protected":false},"excerpt":{"rendered":"

EN: The efficient use of water and other resources as well as the development of an automated monitoring system are key issues in agriculture. The project \u2013 Ultrasensitive gas sensor array for greenhouse environment assessment (GreHSEN) \u2013 developed a monitoring sensor array which can specifically evaluate the level of dangerous gases produced inside of greenhouses … <\/p>\n

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