Optical and kinetic properties of cathodically deposited amorphous tungsten oxide films

Krasnov, Yu. S.; Волков, С. В.; Kolbasov, G. Ya.

doi:10.1016/j.jnoncrysol.2006.08.007

Cited by 20 publications

(10 citation statements)

References 32 publications

(55 reference statements)

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“…Figure 2 shows XRD patterns of the two tungsten oxide samples in Figures 1(a) and 1(b). WO 2 , WO 3 , and W peaks in XRD spectra of the films have been identified based on the literatures [15,16]. The present two samples exhibit mixed states including WO 2 , WO 3 , and W. The polycrystalline WO 3 dominates the composition of the sample prepared at 400…”

Section: Grows and Characterizationsmentioning

confidence: 58%

Ambient Pressure Synthesis of Nanostructured Tungsten Oxide Crystalline Films

Zhang

Yang

Feng

2008

Journal of Nanomaterials

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We report the results of the ambient pressure synthesis of tungsten oxide nanowires and nanoparticles on AlN substrates using the hot filament CVD techniques. The morphologic surface, crystallographic structures, chemical compositions, and bond structures of the obtained samples have been investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and Raman scattering, respectively. Different morphologies were observed for different substrate temperatures, but otherwise identical growth conditions. The experimental measurements reveal the evolutions of the crystalline states and bond structures following the substrate temperatures. Besides, different substrate materials also affected the tungsten oxide nanostructures. Bundles of wire-type tungsten oxide nanowires with a length of up to 5 mm were obtained on Al 2 O 3 substrate. Furthermore, the sensitive properties of the super long nanowires to the gas and different temperature were investigated. The dependence of the sensitivity of tungsten oxide nanowires to the methane as a function of the time was obtained. The sensitive properties of the tungsten oxide nanowires have almost linear relationship with the temperature.

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Section: Grows and Characterizationsmentioning

confidence: 58%

Ambient Pressure Synthesis of Nanostructured Tungsten Oxide Crystalline Films

Zhang

Yang

Feng

2008

Journal of Nanomaterials

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“…Çíà÷åíèÿ n (óìåíüøåííûå íà 1,3) è k íà äëèíå âîëíû 1 ìêì ó ïë¸íêè ãèäðàòèðîâàííîãî WO 3 , â çàâèñèìîñòè îò å¸ ïîòåíöèàëà Èç ðèñ.2 âèäíî, ÷òî îáëàñòü îòðèöàòåëüíûõ çíà÷åíèé ïîòåíöèàëà õàðàêòåðèçóåòñÿ îñëàáëåíèåì çàâèñèìîñòè n(E), òîãäà êàê çíà÷åíèå k ïðîäîëaeàåò ðàñòè. Ýòî âûçâàíî ñìåùåíèåì ìàêñèìóìà ðàñòóùåãî îïòè÷åñêîãî ïîãëîùåíèÿ ïë¸íêè WO 3 â îáëàñòü áîëåå êîðîòêèõ äëèí âîëí (äî ~700 íì) ïî ìåðå óìåíüøåíèÿ å¸ ïîòåíöèàëà äî -0,4Â [11], ÷òî äëÿ çàâèñèìîñòè n(E) íà äëèíå âîëíû 1 ìêì ñîîòâåòñòâóåò íà÷àëó ïîñòåïåííîãî ïåðåõîäà â îáëàñòü àíîìàëüíîé äèñïåðñèè.…”

Section: ýêñïåðèìåíòàëüíûå ðåçóëüòàòû è èõ îáñóAeäåíèåunclassified

Optical Hydrogen Sensor With Increased Sensitivity Based on Tungsten Oxide Film

Колбасов¹,

Волков²,

Краснов³

et al. 2011

SEMST

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Àííîòàöèÿ. Ïðîâåäåíî êîìïüþòåðíîå ìîäåëèðîâàíèå ýôôåêòà îñëàáëåíèÿ ïîëíîãî âíóòðåííåãî îòðàaeåíèÿ â îáëàñòè ãðàíèöû ðàçäåëà ìåaeäó ñòåêëîì è ïë¸íêîé WO 3 ñ òîíêèì ñëîåì êàòàëèçàòîðà (Pt, Pd) âîäîðîäîì â ðàçëè÷íîé êîíöåíòðàöèè â ñìåñè ñ âîçäóõîì. Ðàçðàáîòàíà êîíñòðóêöèÿ è èçãîòîâëåí ëàáîðàòîðíûé îáðàçåö îïòè÷åñêîãî ñåíñîðà âîäîðîäà íà îñíîâå ýòîãî ýôôåêòà ñ áîëüøîé ÷óâñòâèòåëüíîñòüþ ê âîäîðîäó â îáëàñòè ìàëûõ êîíöåíòðàöèé ýòîãî ãàçà â âîäîðîä-âîçäóøíûõ ñìåñÿõ (äî çíà÷åíèÿ, ìåíåå 0,01îá. % [H 2 ]). Ñóùåñòâåííîå ïîâûøåíèå ÷óâñòâèòåëüíîñòè ñåíñîðà ê âîäîðîäó äîñòèãíóòî çà ñ÷åò ìíîãîêðàòíîãî îòðàaeåíèÿ ãðàíèöåé ðàçäåëà ñòåêëî/WO 3 ÈÊ-ñâåòà ñ äëèíîé âîëíû 940 íì ïðè ðàñïðîñòðàíåíèè åãî ïî ñòåêëÿííîìó ñâåòîïðîâîäó. Êëþ÷åâûå ñëîâà: îïòè÷åñêèå ñåíñîðû âîäîðîäà, ïë¸íêè îêñèäà âîëüôðàìà ÂÈÑÎÊÎ×ÓÒËÈÂÈÉ ÎÏÒÈ×ÍÈÉ ÑÅÍÑÎÐ ÂÎÄÍÞ ÍÀ ÎÑÍÎÂ² ÏË²ÂÊÈ ÎÊÑÈÄÓ ÂÎËÜÔÐÀÌÓ Ã. ß. Êîëáàñîâ, Ñ. Â. Âîëêîâ, Þ. Ñ. Êðàñíîâ, Ñ. Ñ. ÔîìàíþêÀíîòàö³ÿ. Ïðîâåäåíî êîìï'þòåðíå ìîäåëþâàííÿ åôåêòó îñëàáëåííÿ ïîâíîãî âíóòð³øíüîãî â³äáèòòÿ â îáëàñò³ ãðàíèö³ ðîçïîä³ëó ì³ae ñêëîì ³ ïë³âêîþ WO 3 ç òîíêèì øàðîì êàòàë³çàòîðà (Pt, Pd) âîäíåì ó ð³çí³é êîíöåíòðàö³¿ â ñóì³ø³ ç ïîâ³òðÿì. Ðîçðîáëåíî êîíñòðóêö³þ é âèãîòîâëåíèé ëàáîðàòîðíèé çðàçîê îïòè÷íîãî ñåíñîðà âîäíþ íà îñíîâ³ öüîãî åôåêòó ç âåëèêîþ ÷óòëèâ³ñòþ äî âîäíþ â îáëàñò³ ìàëèõ êîíöåíòðàö³é öüîãî ãàçó ó âîäíåâî-ïîâ³òðÿíèõ ñóì³øàõ (äî çíà÷åííÿ ìåíø, í³ae 0,01îá. % [H 2 ]). ²ñòîòíå ï³äâèùåííÿ ÷óòëèâîñò³ ñåíñîðà äî âîäíþ äîñÿãíóòî çà ðàõóíîê áàãàòîðàçîâîãî â³äáèòòÿ ãðàíèöåþ ðîçïîä³ëó ñêëî/WO 3 ²×-ñâ³òëà ç äîâaeèíîþ õâèë³ 940 íì ïðè ïîøèðåíí³ éîãî óçäîâae ñêëÿíîãî ñâ³òëîïðîâîäó.

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“…Â îòëè÷èå îò ïëåíîê, íàïûëåííûõ â âàêó-óìå, êàòîäíî îñàaeä¸ííûå ïëåíêè à-WO 3 3]. Ïðè òîëùèíå ïëåíêè 0,5 ìêì ýòî îòâå÷àåò âðåìåíè ñîâìåñò-íîãî ðàñïðîñòðàíåíèÿ ïðîòîíîâ è ýëåêòðîíîâ íà âñþ åå òîëùèíó ïîðÿäêà íåñêîëüêèõ äåñÿòûõ äîëåé ñåêóíäû.…”

Section: G Ya Kolbasov S V Volkov Yu S Krasnov S S Fomanukunclassified

“…Íà ðèñ.1,à ïðèâåäåíû ñïåêòðû õåìèõðîìíîãî îêðàøèâàíèÿ ïë¸íêè WO 3 /Pt, â êîòîðîé ñëîé îêñèäà âîëüôðàìà áûë îñàaeä¸í íà êàòîäå â èì-ïóëüñíîì ðåaeèìå ïðè ïîñòîÿííîì çíà÷åíèè òîêà âåëè÷èíîé 6 ìÀ/ñì 2 ñ ïåðèîäè÷åñêèì, ÷å-ðåç êàaeäûå 10 ñ, èçìåíåíèåì íàïðàâëåíèÿ åãî ïðîòåêàíèÿ. Ïî ìåðå óâåëè÷åíèÿ ñîäåðaeàíèÿ âîäîðîäà â âîçäóõå ïîãëîùåíèå ñâåòà òàêîé õåìèõðîìíîé ïë¸íêîé õàðàêòåðèçóåòñÿ çíà÷è-òåëüíûì ñäâèãîì â âèäèìóþ îáëàñòü ñâåòà, ÷òî ìîaeåò áûòü ñâÿçàíî ñ óìåíüøåíèåì ðàçìåðà íàíîêëàñòåðîâ, äîìèíèðóþùèõ â ñòðóêòóðå òà-êèõ ïëåíîê, äî íàíîêëàñòåðîâ, êîòîðûå èìåþò ðàçìåð ïîðÿäêà îäíîãî íàíîìåòðà è ïðåäñòàâ-ëÿþò ñîáîé àíèîíû ïîëèâîëüôðàìàòîâ [3]. Òà-êèå aeå èçìåíåíèÿ â íàíîñòðóêòóðå ïë¸íîê WO 3 îáíàðóaeèâàþòñÿ è ïðè ââåäåíèè â íèõ îðãàíè-÷åñêèõ èíäèêàòîðîâ.…”

unclassified

Optical Hydrogen Sensor Based on Tungsten Oxide Film

Kolbasov¹,

Волков²,

Krasnov³

et al. 2008

SEMST

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Àííîòàöèÿ. Êàòîäíîå îñàaeäåíèå îêñèäà âîëüôðàìà â èìïóëüñíîì ðåaeèìå, à òàêaeå ñîâ-ìåñòíîå åãî îñàaeäåíèå ñ íåêîòîðûìè èíäèêàòîðàìè (àóðèíîì, íåéòðàëüíûì êðàñíûì, ìå-òèëåíîâûì ãîëóáûì) ïîçâîëèëî ìîäèôèöèðîâàòü íàíîñòðóêòóðó ïîëó÷åííûõ õåìèõðîìíûõ ïë¸íîê WO 3 /Pt äëÿ îïòè÷åñêèõ ñåíñîðîâ âîäîðîäà è ñìåñòèòü ìàêñèìóì îêðàøèâàíèÿ òàêèõ ñåíñîðîâ èç ÈÊ-îáëàñòè ñïåêòðà â âèäèìóþ îáëàñòü. Ïðåäëîaeåí ñïîñîá áûñòðîãî ïåðèîäè-÷åñêîãî îáåñöâå÷èâàíèÿ îïòè÷åñêîãî ñåíñîðà âîäîðîäà ïóò¸ì êðàòêîâðåìåííîãî êîíòàêòà ïë¸íêè WO 3 /Pt ñ ýëåêòðîëèòîì. Àíîòàöiÿ. Êàòîäíå îñàäaeåííÿ îêñèäó âîëüôðàìó â ³ìïóëüñíîìó ðåaeèì³, à òàêîae ñï³ëüíå éîãî îñàäaeåííÿ ç äåÿêèìè ³íäèêàòîðàìè (àóð³íîì, íåéòðàëüíèì ÷åðâîíèì, ìåòèëåíîâèì áëàêèòíèì) äîçâîëèëî ìîäèô³êóâàòè íàíîñòðóêòóðó îòðèìàíèõ õåìiõðîìíèõ ïë³âîê WO 3 /Pt äëÿ îïòè÷íèõ ñåíñîð³â âîäíþ é çì³ñòèòè ìàêñèìóì çàáàðâëåííÿ òàêèõ ñåíñîð³â ç I×-îáëàñòi ñïåêòðà ó âèäèìó îáëàñòü. Çàïðîïîíîâàíî ñïîñ³á øâèäêîãî ïåð³îäè÷íîãî çíåáàðâëåííÿ îï-òè÷íîãî ñåíñîðà âîäíþ øëÿõîì êîðîòêî÷àñíîãî ïðèâåäåííÿ ïë³âêè WO 3 /Pt â êîíòàêò ³ç åëå-êòðîë³òîì.

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Optical and kinetic properties of cathodically deposited amorphous tungsten oxide films

Cited by 20 publications

References 32 publications

Ambient Pressure Synthesis of Nanostructured Tungsten Oxide Crystalline Films

Ambient Pressure Synthesis of Nanostructured Tungsten Oxide Crystalline Films

Optical Hydrogen Sensor With Increased Sensitivity Based on Tungsten Oxide Film

Optical Hydrogen Sensor Based on Tungsten Oxide Film

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