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panjinping(½ð±Ò+20):¹ýÁ˸öÄê»ØÀ´Ò»¿´£¬¾ÓÈ»·­ÒëºÃÁË¡£ËäÈ»ÎÒ×Ô¼ºÒѾ­·­ÒëºÃÁË¡£µ«ÊÇÕâ¸ö½ð±Ò»¹¸øÄã¡£¼øÓÚÓï¾äƽƽ£¬ÔùËÍ60½ð 2010-03-02 11:02
zap65535(½ð±Ò+20): 2010-03-03 10:21
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From the circular voltage curve in fig.4 , Fig.5 is the values of the  potential  windows and the divided oxygen  potential of every sample for different annealing temperature.As shown in Fig.5, potential  windows and the divided oxygen  potential of the BDND electrode have the same change regular with annealing temperature in the acid medium. From non-annealing to annealing at 600 ¡æ, the potential  windows of diamond film become wider and the divided oxygen  potential larger.Combining with the analyzing results of Raman spectrum,see Fig.4,the value of ID/IGis larger and G peak shifts to right.When the thin film was annealed at 800 ¡æ, value of the potential  window and divided oxygen  potential of diamond film are up to the largest,3.28Vand 2.32V,respectively;At this time ,value of ID/IG is the smallest and G peak shifts to left.When the annealing temperature was rised to 1000¡æ,the potential  window and  divided oxygen  potential becomes to narrowest and lowest,2.42V and 1.74V,respectively.In the  Raman spectrum of the film,D peak is strong and sharp,at same time ID/IG value becomes to largest from smallest and G peak goes to last right.
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panjinping(½ð±Ò+20): 2010-03-02 11:02
1150¡æÍË»ðºó£¬µçÊÆ´°¿ÚºÍÎöÑõµçλÓÖ¶¼±ä´ó£¬¶ø´ËʱID/IGÖµÓÖ±äС£¬G·åÓÖ×óÒÆ¡£¿ÉÒÔ¿´³ö£¬³ýÁËδÍË»ðºÍ600¡æÍË»ðÁ½ÖÖÇé¿öÍ⣬ÔÚÆäËûζÈÍË»ðµÄ±¡Ä¤µÄµçÊÆ´°¿ÚºÍÎöÑõµçλÓëID/IGÖµºÍG·å·åÎ»ËæÍË»ðζȵı仯¹æÂÉÏà·´¡£ËµÃ÷sp2ÏàÍŴصÄÊýÁ¿¼õÉÙ»ò³ß´ç±äС¡¢Ê¯Ä«ÏàÎÞÐò»¯³Ì¶ÈµÄÔö¼ÓÓÐÀûÓÚÔö´ó½ð¸ÕʯĤµç¼«µÄµçÊÆ´°¿ÚºÍÎöÑõµçλ¡£
After annealing at 1150¡æ,the potential  window and  divided oxygen  potential become larger again while the value of ID/IG smaller and G peak shifts left. One can see that ,except for  non-annealing and annealing at 600 ¡æ,the change regular of the potential  window and  divided oxygen  potential for the film annealed at other temperatures to the value of ID/IG and the positions of G peak is opposite with the change of annealing temperature.This indicates that samller number or size of sp2 phase cluster and the increase of the graphite phase disorder degree are in favor of increasing potential  window and  divided oxygen  potential of diamond film electrode.¶ÔÓÚ600¡æÍË»ðÊÔÑù£¬±¡Ä¤µÄ¾§½çÉϾۼ¯µÄ´óÁ¿µÄ·´Ê½¾ÛÒÒȲÊǵ¼ÖµçÊÆ´°¿ÚºÍÎöÑõµçλûÓмõСµÄÔ­Òò¡£³ýÁË1000¡æ£¬ÆäËüζÈÍË»ðºóµÄµç¼«µÄµçÊÆ´°¿ÚºÍÎöÑõµçλ¶¼±ÈδÍË»ðµç¼«µÄÒª´ó£¬·Ö±ð´óÓÚ3VºÍ2V£¬¶øÒ»°ãÓлúÎïµÄÑõ»¯µçλΪ1.5V¦ä2.0VÖ®¼ä£¬Òò´Ë´ÓÀíÂÛÉÏÀ´Ëµ£¬´ó¶àÊýÓлúÎÛȾÎï¶¼ÄÜÔڵ缫Éϱ»Ñõ»¯¡£To the sample annealed at 600¡æ, lots of trans-polyacetylene gathered in the grain boundaries of thin film is the reason of potential  window and  divided oxygen  potential  without lower.Except for 1000 ¡æ,potential  windows and  divided oxygen  potentials of the electrode annealed at the other temperature are larger than that of non-annealing,and larger than 3V and 2V, respectively.While oxygen potential of general organic matter are between 1.5V¦ä2.0V, thus from the theory, most of the organic pollution can be oxidized on the electrode.
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panjinping(½ð±Ò+20): 2010-03-02 11:02
ÎÒÃÇÒÔǰµÄÑо¿½á¹û±íÃ÷£¬½ð¸Õʯ±¡Ä¤ÖÐÅðŨ¶ÈÔö´ó»áʹĤµç¼«µÄµçÊÆ´°¿ÚºÍÎöÑõµçλ¼õС£»Òò´Ë1000¡æÍË»ðµç¼«µÄÕ­µçÊÆ´°¿ÚºÍµÍÎöÑõµçλ³ýÁËÓÉÓÚsp2ÏàÍŴصÄÊýÁ¿Ôö¼Ó»ò³ß´ç±ä´óÒÔ¼°Ê¯Ä«ÏàÓÐÐò»¯³Ì¶ÈÔö¼ÓµÄÓ°ÏìÍ⣬»¹ÓÉÓÚ¸ßÎÂÍË»ðÒýÆðÅðµÄÀ©É¢½øÈëÄÉÃ×½ð¸Õʯ¾§Á£ÖеÄÓ°Ï죬ÕâÓëÄÜÆ×ÏÔʾ½ð¸Õʯ¾§Á£ÖÐÅðµÄ´óÁ¿´æÔÚÏàÒ»Ö¡£
The results of our precursor study indicate that the increase of B concentration in diamond thin film can lead to the decease of  potential  window and  divided oxygen  potential  ;Therefore,to the narrow  potential  window and low divided oxygen  potential of the electrode annealed at 1000¡æ,besides the influence from increase of sp2 phase cluster number , size and    graphite phase order degree ,the diffuse and enter nanodiamond grain of B resulting from high temperature annealing is another reason. It agrees with that lots of B exist in diamond grains shown in spectrum.
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