| ²é¿´: 1174 | »Ø¸´: 5 | |||
jaychenylľ³æ (СÓÐÃûÆø)
|
[½»Á÷]
Àë×Ó̽Õ루IMS 1280»òNanoSIMS£©ÓÃCs+×öÒ»´ÎÀë×ÓԴʱµÄµç×Óǹ²¹³¥ ÒÑÓÐ2È˲ÎÓë
|
|
Àë×Ó̽ÕëÓÃCs+×öÒ»´ÎÀë×ÓԴʱµÄÐèÒªµç×Óǹ²¹³¥£¬ÊÇʲôÔÒò? ΪºÎO-×öÒ»´ÎÀë×ÓԴʱ²»Ðè񻀯£¿ |
» ²ÂÄãϲ»¶
355 BÇøµØÖʵ÷¼Á
ÒѾÓÐ1È˻ظ´
½âËøÇàÉÙÄ긺ÔðÈξö²ßµÄ¹Ø¼ü£º»ùÓÚPISA 2022È«ÇòÊý¾ÝµÄSELά¶ÈÑо¿³É¹û·¢±í
ÒѾÓÐ1È˻ظ´
µØÇòÎïÀíѧºÍ¿Õ¼äÎïÀíѧÂÛÎÄÈóÉ«/·ÒëÔõôÊÕ·Ñ?
ÒѾÓÐ145È˻ظ´
282Çóµ÷¼Á
ÒѾÓÐ0È˻ظ´
» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:
ï®Àë×Óµç³Ø¸º¼«²ÄÁÏFe3O4µÄÑо¿½øÕ¹
ÒѾÓÐ1È˻ظ´
ÇâÀë×ÓÊÇ¿¹´ÅÐÔ»¹ÊÇ˳´ÅÐÔ
ÒѾÓÐ4È˻ظ´
ï®Àë×Óµç³Ø¸º¼«²ÄÁÏ×ö³ä·Åµç²âÊÔʱ£¬Ïȷŵ磬û·Åµ½É趨µçѹ£¬ÎªºÎµçѹÓÖÉÏÉýÁË
ÒѾÓÐ11È˻ظ´
ï®Àë×Óµç³ØÈýÔªÕý¼«²ÄÁϵÄÑо¿½øÕ¹
ÒѾÓÐ532È˻ظ´
»¯Ñ§ÖпÉÒÔͨ¹ýʲô×÷ÓÃÀ´½áºÏÖØ½ðÊôÀë×Ó£¿
ÒѾÓÐ11È˻ظ´
ï®Àë×Óµç³ØÖеÄÂÁ²¸¯Ê´»úÀíÊÇʲô
ÒѾÓÐ12È˻ظ´
ÖÊÆ×µÄ¸ºÀë×ÓģʽÏìÓ¦ºÜ²î
ÒѾÓÐ5È˻ظ´
Àë×ÓÒºÌå×îºóÐýתÕô·¢
ÒѾÓÐ6È˻ظ´
ÜÅ×öÓ«¹â̽Õë²â¶¨SAAµÄCMC
ÒѾÓÐ8È˻ظ´
ÈçºÎÀûÓÃword »òÕßultra-edit ½«Ïàͬºó׺µÄÐÅÏ¢Ò»´ÎÐÔÌáÈ¡³öÀ´
ÒѾÓÐ7È˻ظ´
¡¾ÇóÖú¡¿ÇëÎÊ×öºË´ÅµÄÆ×ͼÊÇ¶ÔµÄ µ«ÊÇ×öÖÊÆ×ÓÖ²»¶Ô Àë×ÓÔ´ÊÇESI Õâ¸öÎÊÌâÔõô°ìÄØ£¿
ÒѾÓÐ12È˻ظ´
¡¾·ÖÏí¡¿µØÑ§ÊµÑéÊÒ¼°ÒÇÆ÷ɨ䣨1£©--Àë×Ó̽ÕëʵÑéÊÒ
ÒѾÓÐ7È˻ظ´
¡¾ÇóÖú¡¿ÐÂÊÖ×Éѯ×öï®Àë×Óµç³Øµç½âÖÊ·½Ïò
ÒѾÓÐ5È˻ظ´
¡¾ÇóÖú¡¿ÖÊÆ×¿ª»úʱ£¬Ëļ¶¸ËºÍÀë×ÓԴζȲ¨¶¯³¬´ó£¬´Ó60˲¼äìµ½480¶È£¬Ôõô»ØÊ£¿
ÒѾÓÐ6È˻ظ´
ling613613
Ìú³æ (ÖªÃû×÷¼Ò)
- Ó¦Öú: 2 (Ó×¶ùÔ°)
- ½ð±Ò: 1691.3
- É¢½ð: 9991
- ºì»¨: 35
- Ìû×Ó: 5217
- ÔÚÏß: 388.5Сʱ
- ³æºÅ: 1163966
- ×¢²á: 2010-12-06
- רҵ: ÑÒʯѧ
¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
|
ÎÒÒ²²»Ì«Çå³þ£¬¸úÄãÌÖÂÛ°¡¡£ ÎÒÀí½âÊÇ£ºÓÃCs+ ¿ÉÒÔÔö¼Ó¶þ´ÎÒõÀë×ÓµÄÀë×Ó²úÂÊ£¬È磨F-,Cl-ºÍO-£©£¬Ê¹µÃ¼ì²âÕâЩÒõÀë×ÓµÄÁéÃô¶ÈÌá¸ß¡£µ±ÓÃCs+ºä»÷¾øÔµÑùÆ·±íÃæÊ±£¬ÑùÆ·±íÃæ»á²úÉúµçºÉ»ýÀÛ£¬Ê¹·ÖÎöÎÞ·¨½øÐУ¬ÐèÒªÓõç×Óǹ½øÐеçºÉÖк͡£ |
2Â¥2012-04-04 22:24:36
jaychenyl
ľ³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1804.7
- ºì»¨: 1
- Ìû×Ó: 265
- ÔÚÏß: 68.7Сʱ
- ³æºÅ: 776454
- ×¢²á: 2009-05-21
- ÐÔ±ð: MM
- רҵ: Í¬Î»ËØµØÇò»¯Ñ§
|
ÎÒ¿´µ½ÓÐÆªÎÄÏ×ÌáÁËһϣ¬¸úÄã˵µÄÒ»Ñù¡£ÎÒÒ²Ìù¹ýÀ´ÁË£¬²»¹ý×îºóÒ»¾äÎÒûÃ÷°×£¬This can be problematic when parts of the sample conduct.Ϊʲô²¿·Öµ¼µç¾Í»áÓÐÎÊÌ⣿ÁíÍ⣬ÓÃO-¾Í²»»áÓеçºÉÀÛ»ýÂ𣿠As SIMS uses high voltages to accelerate the primary ions, the sample must be conductive. It is therefore necessary to coat non-conducting samples, such as minerals, glasses and ceramics, with a conductive metal film. Typically, a thin (5 nm) gold (Au) coat is used as Au generally does not react with the sample. During sputtering, the Au coat is eroded away exposing the underlying sample surface, which becomes, once again, non-conductive. The ionisation efficiency, and hence the secondary ion yield from the sample, increases with increasing primary ion implantation. As the ion beam erodes the Au coat away, there is an optimum time when the signal is strongest ¨C shortly before the Au coat is entirely removed. After this stage, an electron flood gun may be used to dissipate charge build-up along the edges of the sputter crater, and allow secondary ions to leave the sample surface. This can be problematic when parts of the sample conduct. |
3Â¥2012-04-07 09:48:48
ling613613
Ìú³æ (ÖªÃû×÷¼Ò)
- Ó¦Öú: 2 (Ó×¶ùÔ°)
- ½ð±Ò: 1691.3
- É¢½ð: 9991
- ºì»¨: 35
- Ìû×Ó: 5217
- ÔÚÏß: 388.5Сʱ
- ³æºÅ: 1163966
- ×¢²á: 2010-12-06
- רҵ: ÑÒʯѧ
4Â¥2012-04-09 04:20:31
jaychenyl
ľ³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1804.7
- ºì»¨: 1
- Ìû×Ó: 265
- ÔÚÏß: 68.7Сʱ
- ³æºÅ: 776454
- ×¢²á: 2009-05-21
- ÐÔ±ð: MM
- רҵ: Í¬Î»ËØµØÇò»¯Ñ§
5Â¥2012-04-09 14:05:27
taolanli
ͳæ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
- ½ð±Ò: 1417.7
- ºì»¨: 1
- Ìû×Ó: 136
- ÔÚÏß: 132.3Сʱ
- ³æºÅ: 2015939
- ×¢²á: 2012-09-20
- ÐÔ±ð: GG
- רҵ: Ö²ÎïÓªÑøÑ§

6Â¥2014-07-15 09:50:37














»Ø¸´´ËÂ¥
10