• Non ci sono risultati.

Tungsten Oxide Nanowires on Micro Hotplates for Gas Sensing Applications

N/A
N/A
Info
Scarica
Protected

Academic year: 2021

Condividi "Tungsten Oxide Nanowires on Micro Hotplates for Gas Sensing Applications"

Copied!
4
0
0

Caricamento.... (Visualizza il testo completo ora)

Scarica adesso ( 4 pagine )

Testo completo

(1)

Procedia Engineering 120 ( 2015 ) 439 – 442 Available online at www.sciencedirect.com

1877-7058 © 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Peer-review under responsibility of the organizing committee of EUROSENSORS 2015

doi: 10.1016/j.proeng.2015.08.663

ScienceDirect

(8526(16256

7XQJVWHQ2[LGH1DQRZLUHVRQPLFURKRWSODWHVIRU*DV6HQVLQJ

DSSOLFDWLRQV

'DULR=DSSD

DE

$QJHOD%HUWXQD

DE

(OLVDEHWWD&RPLQL

DE

0DUWLQ+HUROG

F

1LFROD3ROL

DE



*LRUJLR6EHUYHJOLHUL

DE



a University of Brescia (DII), Via Valotti 9, 25133 Brescia, Italy b CNR-INO, Via Branze 38, 25133 Brescia, Italy

c ams Sensor Solutions Germany GmbH, Gerhard-Kindler-Str. 8, 72770 Reutlingen, Germany

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

&2  )LUVWO\ D WHPSHUDWXUH VFUHHQLQJ ZDV SHUIRUPHG WR LGHQWLI\ WKH RSWLPDO ZRUNLQJ WHPSHUDWXUH LQ SUHVHQFH RI HDFK WDUJHW FRPSRXQG0RUHRYHUFDOLEUDWLRQFXUYHVZHUHREWDLQHGDQGWKHLQIOXHQFHRIKXPLGLW\ZDVWDNHQLQWRDFFRXQWIRU12  ‹7KH$XWKRUV3XEOLVKHGE\(OVHYLHU/WG 3HHUUHYLHZXQGHUUHVSRQVLELOLW\RIWKHRUJDQL]LQJFRPPLWWHHRI(8526(16256 Keywords:PHWDOR[LGHVQDQRZLUHVPLFURKRWSODWHVFKHPLFDOVHQVLQJ ,QWURGXFWLRQ 0HWDOR[LGHV 02; DUHDPRQJWKHPRVWFRPPRQPDWHULDOVEHLQJXVHGIRUJDVVHQVLQJDSSOLFDWLRQVGXHWRWKHLU KLJK VWDELOLW\ ORZ FRVW DQG JRRG VHQVLWLYLW\ FRPSDUHG ZLWK PRVW RI WKH RWKHU JDV VHQVLQJ PDWHULDOV 0HWDO R[LGH





&RUUHVSRQGLQJDXWKRU7HO

E-mail address:GDULR]DSSD#XQLEVLW

© 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

(2)

440 Dario Zappa et al. / Procedia Engineering 120 ( 2015 ) 439 – 442

QDQRZLUHV LQ SDUWLFXODU DUH ZHOONQRZQ DV FDQGLGDWH IRU D QHZ JHQHUDWLRQ RI ORZFRVW FKHPLFDO VHQVRUV 1DQRVWUXFWXUHGWXQJVWHQR[LGHFRXOGHQKDQFHWKHRYHUDOOSHUIRUPDQFHVRIWKHGHYLFHVFRPSDUHGWRWUDGLWLRQDOWKLQILOP WHFKQRORJ\>@>@$VZLGHO\NQRZQPHWDOR[LGHVHQVLQJPHFKDQLVPLVWKHUPDOO\DFWLYDWHGDQGWKHRSWLPDOZRUNLQJ WHPSHUDWXUHLVLQWKHUDQJHRIƒ&>@3RZHUFRQVXPSWLRQRIWKHZKROHGHYLFHLVWKXVDOLPLWLQJIDFWRUIRUWKHLU XVHLQDZLGHUDQJHRIDSSOLFDWLRQV

0LFUR KRWSODWHV LQWHJUDWH ERWK HOHFWURGHV DQG KHDWLQJ HOHPHQWV RQ D PLFURIDEULFDWHG 0(06  PHPEUDQH ,Q SDUWLFXODUDPVLVDOHDGLQJFRPSDQ\LQWKHILHOGRIJDVVHQVRUGHYLFHVDQGLWVIDPLO\RIPLFURKRWSODWHVSURYLGHGYHU\ ORZSRZHUFRQVXPSWLRQWRJHWKHUZLWKWKHDELOLW\WRVXVWDLQKLJKZRUNLQJWHPSHUDWXUH PD[ƒ&  )LJXUH 





Figure 1: ams micro hotplate model E120:20. ([SHULPHQWDO 7KHUPDOO\R[LGL]HGWXQJVWHQR[LGHQDQRZLUHVZHUHVXFFHVVIXOO\V\QWKHWL]HGRQDPV(PLFURKRWSODWHVXVLQJ DWXEXODUIXUQDFHLQORZYDFXXP$WKLQOD\HU QP RIPHWDOOLFWXQJVWHQZDVGHSRVLWHGRQWKHKRWSODWHVE\5) PDJQHWURQVSXWWHULQJ :DUJRQSODVPD[PEDUURRPWHPSHUDWXUH $IWHUZDUGVVDPSOHVZHUHR[LGL]HGLQ DWXEXODUIXUQDFHDWƒ&IRURQHKRXULQRUGHUWRSURPRWHWKHJURZWKRIWKHQDQRZLUHV3UHVVXUHLQVLGHWKHDOXPLQD WXEHZDVVHWDWPEDUZLWKDQDUJRQIORZRI6&&0 $ILHOGHPLVVLRQVFDQQLQJHOHFWURQPLFURVFRSH )(6(0 /(2ZDVRSHUDWHGDWN9LQRUGHUWRLQYHVWLJDWH WKHPRUSKRORJ\RIWKHQDQRVWUXFWXUHV

5DPDQ VSHFWUD ZHUH PHDVXUHG E\+25,%$ PRQRFKURPDWRU L+5 FRQILJXUHGZLWKD JUDWLQJRIJPP FRXSOHGWRD3HOWLHUFRROHG6\QDSVH&&'$+H&GODVHU QP ZDVIRFXVHGRQWKHVDPSOHVE\DILEHUFRXSOHG FRQIRFDORSWLFDOPLFURVFRSH +25,%$ DW[PDJQLILFDWLRQ6SHFWUDZHUHUHFRUGHGLQWKHZDYHOHQJWKUDQJH FP

,QRUGHUWRIDEULFDWHWKHVROGHULQJSDGVIRUWKHVHQVLQJGHYLFHVZHILUVWO\GHSRVLWHGD7L:DGKHVLRQOD\HUE\'& PDJQHWURQ VSXWWHULQJ  : DUJRQ SODVPD  ƒ& [ PEDU  DQG WKHQ ZH GHSRVLWHG LQWHUGLJLWHG SODWLQXP

FRQWDFWVXVLQJWKHVDPHFRQGLWLRQGHVFULEHGEHIRUH$SODWLQXPKHDWHUZDVGHSRVLWHGRQWKHEDFNVLGHRIDOXPLQD VXEVWUDWHVYLDWKHVDPHWZRVWHSVWHFKQLTXHXVHGIRUFRQWDFWV6DPSOHVZHUHILQDOO\PRXQWHGRQ72SDFNDJHVXVLQJ HOHFWURVROGHUHGJROGZLUHV )XQFWLRQDOFKDUDFWHUL]DWLRQZDVSHUIRUPHGRQWKHIDEULFDWHGGHYLFHV2SWLPDOZRUNLQJWHPSHUDWXUHWRZDUGVVRPH FKHPLFDOFRPSRXQGRILQWHUHVWZDVLGHQWLILHG,QSDUWLFXODUQLWURJHQGLR[LGHFDUERQPRQR[LGHHWKDQRODQGDFHWRQH ZHUHVHOHFWHGDVWDUJHWFRPSRXQGV7KHLQIOXHQFHRIKXPLGLW\ZDVDOVRWDNHQLQWRDFFRXQW 5HVXOWV )LJXUHVKRZVD6(0SLFWXUHRIWXQJVWHQR[LGHQDQRZLUHVREWDLQHGRQDPVPLFURKRWSODWHV1DQRZLUHGLDPHWHUV ZHUHHVWLPDWHGLQWKHRUGHURIIHZWHQVRIQDQRPHWHUV QP 

(3)

441 Dario Zappa et al. / Procedia Engineering 120 ( 2015 ) 439 – 442



Figure 2: SEM picture of WO3 nanostructures synthetized on ams substrates, at 600°C with a pressure of 1 mbar (60 minutes).

6WUXFWXUDOLQYHVWLJDWLRQFRQILUPVWKHFU\VWDOOLQLW\RIWKHPDWHULDOUHVXOWLQJLQSXUHWXQJVWHQWULR[LGH )LJXUH 7KH UHFRUGHGVSHFWUXPSHUIHFWO\PDWFKHVWKH:2UHIHUHQFH>@FPDQGFPSHDNVDUHW\SLFDO5DPDQSHDNV

RIPRQRFOLQLFFU\VWDOOLQH:2 :2:VWUHWFKLQJYLEUDWLRQV 7KHDGGLWLRQDOSHDNVDWDQGFPDUHGXHWR

WKHEHQGLQJYLEUDWLRQį 2:2 





Figure 3: Raman Spectroscopy of WO3 nanostructures synthetized on alumina substrates, at 600°C with a pressure of 1 mbar (60 minutes).

)XQFWLRQDOFKDUDFWHUL]DWLRQZDVSHUIRUPHGRQWKHIDEULFDWHGGHYLFHV'\QDPLFUHVSRQVHVKRZVWKHW\SLFDOEHKDYLRU RIQW\SHWXQJVWHQR[LGHLQSUHVHQFHRIR[LGL]LQJ 12 DQGUHGXFLQJ HWKDQROFDUERQPRQR[LGHDQGDFHWRQH JDVHV

)LJXUHOHIW 2SWLPDOZRUNLQJWHPSHUDWXUHUHVXOWVƒ&IRUHWKDQRODQGDFHWRQHDQGƒ&IRUQLWURJHQGLR[LGH &DOLEUDWLRQ FXUYHV ZHUH SHUIRUPHG DW WKHVH WHPSHUDWXUHV DQG SRZHU ODZ ILWWLQJ ZHUH FDOFXODWHG )LJXUH  ULJKW  'HWHFWLRQOLPLWVGHILQHGDVWKHJDVFRQFHQWUDWLRQWRKDYHDUHVSRQVHRIRQHZHUHHVWLPDWHGDVSSPIRUHWKDQRODQG DFHWRQHDQGSSPIRUQLWURJHQGLR[LGH

5HSHDWDELOLW\RIWKHPHDVXUHZDVDOVRLQYHVWLJDWHGUHVXOWLQJLQDPLVPDWFKRIOHVVWKDQRYHUWKUHHFRQVHFXWLYH PHDVXUHPHQWV 7KH LQIOXHQFH RI KXPLGLW\ ZDV DOVR WDNHQ LQWR DFFRXQW ,QYHVWLJDWLRQ FRQILUPV WKDW FKDQJLQJ WKH KXPLGLW\IURPWRKDVOHVVLQIOXHQFHRQWKHPHDVXUHWKDQUHSHDWDELOLW\LWVHOI

 

(4)

442 Dario Zappa et al. / Procedia Engineering 120 ( 2015 ) 439 – 442

Figure 4: (left) Dynamic response of WO3 NWs on ams micro hotplate model E120:20 at 200°C, with RH=50%@20°C. (right) Calibration curve and power fitting of WO3 NWs on ams micro hotplate model E120:20

with RH=50%@20°C. &RQFOXVLRQV

7XQJVWHQR[LGHQDQRZLUHVZHUHGLUHFWO\JURZQRQDPVPLFURKRWSODWHE\XVLQJWKHUPDOR[LGDWLRQWHFKQLTXHLQ YDFXXP,QYHVWLJDWLRQFRQILUPVWKHFU\VWDOOLQHVWUXFWXUHRIWKHPDWHULDODQGWKHORZGLPHQVLRQDOLW\&RQGXFWRPHWULF FKHPLFDO VHQVLQJ GHYLFHV ZHUH IDEULFDWHG DQG WKH IXQFWLRQDO SHUIRUPDQFHV ZHUH HYDOXDWHG LQ SUHVHQFH RI VRPH FKHPLFDOFRPSRXQGV

,Q FRQFOXVLRQ WKH XVH RI PLFUR KRWSODWHV GHYLFHV LV FRPSDWLEOH ZLWK WKLV V\QWKHVLV WHFKQLTXH DQG HQDEOH WKH IDEULFDWLRQRIORZSRZHUGHYLFHVIRUDFRPSOHWHO\QHZUDQJHRIDSSOLFDWLRQV

$FNQRZOHGJHPHQWV

7KH ZRUN KDV EHHQ VXSSRUWHG E\ WKH ,WDOLDQ 0,85 WKURXJK WKH ),5% 3URMHFW 5%$3$<1 ³2[LGHV DW WKH QDQRVFDOHPXOWLIXQFWLRQDOLW\DQGDSSOLFDWLRQV´7KLVZRUNZDVSDUWLDOO\VXSSRUWHGE\WKH(XURSHDQ&RPPXQLW\¶VWK )UDPHZRUN 3URJUDPPH XQGHU WKH JUDQW DJUHHPHQW Qƒ  ³063 0XOWL 6HQVRU 3ODWIRUP IRU 6PDUW %XLOGLQJ 0DQDJHPHQW´

5HIHUHQFHV

>@:DQJ;60LXUD1DQG<DPD]RH16HQV$FWXDWRU%&KHP  

>@0HQJ'6KDDODQ10<DPD]DNL7DQG.LNXWD76HQV$FWXDWRU%&KHP

Figura

Figure 1: ams micro hotplate model E120:20. ([SHULPHQWDO 7KHUPDOO\R[LGL]HGWXQJVWHQR[LGHQDQRZLUHVZHUHVXFFHVVIXOO\V\QWKHWL]HGRQDPV(PLFURKRWSODWHVXVLQJ DWXEXODUIXUQDFHLQORZYDFXXP$WKLQOD\HU QP RIPHWDOOLFWXQJVWHQZDVGH
Figure 3: Raman Spectroscopy of WO 3 nanostructures synthetized on alumina substrates, at 600°C with a pressure of 1 mbar (60 minutes)
Figure 4: (left) Dynamic response of WO 3 NWs on ams micro hotplate model E120:20 at 200°C, with RH=50%@20°C

Riferimenti

Scarica adesso ( PDF - 4 pagine - 510.92 KB )

Documenti correlati

Effect of platelet lysate on human cells involved in different phases of wound healing

PL biological effect on cell viability, proliferation, migration, angiogenesis, intracellular pathways activation and inflammatory response was performed using four

Response to the letter to the Editor by Dr. Rosario: “The calcium-to-phosphorous (Ca/P) ratio in the diagnosis of primary hyperparathyroidism and hypoparathyroidism: a multicentric study”.

In conclusion, we sincerely appreciate Dr Rosario ’s suggestions to test the diagnostic performance of the Ca/P ratio in a particular setting of patients with NPHPT pre- senting

Guarda Oltre il velo: Abdul Hamid’s Daughter: The Tragedy of an Ottoman Princess di Melek Hanoum e Grace Ellison, tra orientalismo e istanze di emancipazione

Anche se li infilano in modo errato (scatenando l’ilarità della scrittrice), sono le donne ottomane a indossare i suoi corsetti, manicotti e cappellini, subito scartati,

Guarda Bronzi figurati romani da luoghi di culto dell’Italia settentrionale

Nel santuario di Lagole di Calalzo, nel Cadore, a forte connotazione “naturale” (radura fra i boschi, su un’altura, in zona con acque sorgive e piccole grotte) e apparentemente

Oral drug therapy in elderly with dysphagia: between a rock and a hard place!

Caregivers in hospital geriatric units routinely compound in solid oral dosage forms for dysphagic patients by crushing the tablets or opening the capsules to

The role of the reference building in the evaluation of energy efficiency measures for large stocks of public buildings

case energy audit, along with the evaluation and validation of Energy Conservation Measures (ECMs), represent a challenging, time and cost-spending perspective. For this

Verso un modello di governance resiliente del patrimonio pubblico : azioni di rigenerazione urbana sull’ex complesso ospedaliero G. B. Giustinian

L’identifica- zione della tipologia di unità di spazio sulla cartografia allegata alla VPRG e lo studio delle descrizioni morfologiche, delle prescri- zioni di intervento e

Autophagy: A New Mechanism of Prosurvival and Drug Resistance in Multiple Myeloma

Specifically, because of the dual role of autophagy as mechanism of prosurvival or cell death, targeting autophagy may focus on activation (ie, rapamicyn, everolimus, BH3 mimetics)